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March-April 2024: The Next Full Moon is the Crow, Crust, Sap, Sugar, or Worm Moon


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March-April 2024: The Next Full Moon is the Crow, Crust, Sap, Sugar, or Worm Moon

A full moon rises above snow-capped mountain peaks in this chilly image.
A full moon rises over Utah.
Credits:
NASA/Bill Dunford

The next full moon is the Crow, Crust, Sap, Sugar, or Worm Moon; the Paschal Moon; Purim; the Holi Festival Moon; Madin Poya; the Pothole Moon; a Micromoon, and a Partial Lunar Eclipse.

The next full moon will be on Monday morning, March 25, 2024, appearing opposite the Sun in Earth-based longitude at 3 AM EDT. This will be on Sunday evening from Alaska Time westward to the International Date Line. Around this time the Moon will pass through the partial shadow of the Earth (called a penumbral lunar eclipse). The slight dimming of the Moon will be difficult to notice, but see if you can tell if the lower part of the Moon is dimmer than the upper part. The Moon will begin entering the Earth’s shadow at 12:53 AM, reach greatest eclipse at 3:13 AM with 96% of the Moon in partial shadow, and exit the shadow at 5:32 AM. Since this full Moon is a little over a day after apogee (when the Moon is at its farthest from the Earth in its orbit) this is a micromoon, the opposite of a supermoon. The Moon will appear full for about 3 days around this time, from Saturday evening through Tuesday morning.

The Maine Farmers’ Almanac began publishing “Indian” names for full Moons in the 1930s and these names are now widely known and used. According to this almanac, as the full Moon in March the tribes of the northeastern United States called this the Crow, Crust, Sap, Sugar, or Worm Moon. The more northern tribes of the northeastern States knew this as the Crow Moon, with the cawing of crows signaling the end of winter. Other northern names were the Crust Moon, because the snow cover became crusted from thawing by day and freezing by night, or the Sap (or Sugar) Moon as this was the time for tapping maple trees. The more southern tribes called this the Worm Moon after the earthworm casts that appeared as the ground thawed. It makes sense that only the southern tribes called this the Worm Moon. When glaciers covered the northern part of North America they wiped out the native earthworms. After these glaciers melted about 12,000 years ago the more northern forests grew back without earthworms. Most of the earthworms in these areas are invasive species introduced from Europe and Asia.

In the western Christian ecclesiastical calendar this is the Paschal Moon, from which the date of Easter is calculated. Paschal is the Latinized version of Pesach, Hebrew for Passover. Initially, the Christian holiday of Easter, also called Pascha, was celebrated on the first Sunday after the first full Moon of spring. However, there are differences between the times of these astronomical events and the calendars now used by the Eastern and Western churches. Western Christianity will be celebrating Easter on Sunday, March 31, 2024, the Sunday after this first full Moon of spring. The date of Eastern Orthodox Easter is based on the Julian calendar and will be on Sunday, May 5.

Many lunar and lunisolar calendars start the months on the new Moon with the full Moon in the middle of the month. Lunisolar calendars add or repeat a month as needed to keep the lunar months aligned with the solar seasons. This full Moon is in the middle of the second month of Adar in the Hebrew calendar and corresponds with Purim, celebrated from sunset on March 23 to sunset on March 24, 2024, the 14th of the Adar II (a day later in Jerusalem and ancient walled cities). Purim marks the Jewish people’s deliverance from a royal death decree around the fourth century BCE as told in the Book of Esther. Purim is celebrated by exchanging gifts of food and drink, feasting, and donating to charity.

In the Islamic calendar this full Moon is near the middle of the holy month of Ramadan. Ramadan is honored as the month in which the Quran was revealed. Observing this annual month of charitable acts, prayer, and fasting from dawn to sunset is one of the Five Pillars of Islam.

As the full Moon in the Hindu month Phalguna, this Moon corresponds with the Holi festival, celebrating the victory of good over evil and the start of spring. This two-day long festival is also known as the Festival of Love, Festival of Colors, or the Festival of Spring. Holi begins with a bonfire the evening before the day of the full Moon, continues on the day of the full Moon with a free-for-all game involving the spraying of colored powders and/or colored water on whomever wanders by, and ends with evening visits with friends and family.

Every full Moon is a holiday in Sri Lanka. This full Moon is Medin or Madin Poya, marking the Buddha’s first visit to his father after his enlightenment.

Continuing the tradition of naming Moons after prominent phenomena tied to the time of year, a few years ago my friend Tom Van Wagner suggested naming this the Pothole Moon. It may be a case of confirmation bias, but whether in my car or on my bicycle I notice more potholes this time of year.

As usual, the wearing of suitably celebratory celestial attire is encouraged in honor of the full Moon.

As for other celestial events between now and the full Moon after next (with specific times and angles based on the location of NASA Headquarters in Washington, DC):

Total Eclipse of the Sun

There will be a total eclipse of the Sun on Monday, April 8, 2024. This total eclipse will be visible in a swath ranging from 142 (88 miles) wide near the start and end to 203 km (126 miles) wide near the middle of the swath. The path of the total eclipse will begin in the Pacific south of the equator, start passing over North America on the coast of Mexico near Mazatlán, cross the USA from Texas to Maine, exit North America from Canada on the coast of Newfoundland, and end in the North Atlantic. Outside of this narrow swath, most of North and Central America will see a partial solar eclipse. See https://science.nasa.gov/solar-system/skywatching/eclipses/solar-eclipses/2024-solar-eclipse/total-solar-eclipse-2024-the-moons-moment-in-the-sun/ for more information.

Assuming you can find a place with clear skies near the centerline of this swath, this eclipse, in particular, should be quite a show. Compared to the eclipse in 2017, the Moon will be nearer its closest to the Earth, making its shadow larger, the sky darker, and the eclipse longer. In addition, the Sun will be nearer its maximum in its 11-year cycle, so the corona, which can only be seen during a total eclipse, should be more spectacular. If the sky is clear during the eclipse, you will be able to see the planets and some stars that are not normally visible this time of year. Bright Jupiter will be to the upper left of the eclipse, with Venus, Saturn, and Mars to the lower right. In the unlikely event that the comet 12P/Pons-Brooks has an outburst that makes it significantly brighter (described below), you may be able to see it to the right of Jupiter (if it isn’t obvious, I recommend enjoying the eclipse rather than spending time searching for a comet you might not be able to see).

Plenty of information about this total eclipse is available elsewhere, so I will refrain from adding much more, but please read and pay attention to eye safety. The only time it is safe to look directly at the Sun is when it is completely blocked by the Moon, so that you can only see the much fainter corona. Staring directly at even a small sliver of the Sun can do permanent eye damage.

This eclipse will be passing through or near many populated areas, making it possible to trade off waiting for more accurate weather forecasts for clear skies against the difficulties of making last minute bookings or dealing with  traffic jams if you wait until the day of the eclipse to drive to the zone of totality.

Total eclipses of the Sun are rare and spectacular events. I recognize that not everyone will be able to drop everything and go see this one, but seeing at least one good, total eclipse in a clear sky should be on your bucket list. A partial eclipse is just not the same. The only other reason I can think of for not going where you can see this total eclipse (other than you absolutely can’t at this time) is that if you see this eclipse, you are likely to want to see more, and will begin making plans to go to North Africa in 2026, Australia in 2028, etc. The next three eclipses visible from parts of North America will be in 2044, 2045, and 2052.

Comet 12P/Pons-Brooks

During this lunar cycle, comet 12P/Pons-Brooks will be visible with binoculars or a telescope, and may become bright enough to be a naked eye comet. In my quick searches of the web I found visual guides that provide specific information on when and where to look from your location on any given night. However, I did not see a concise guide to when might be the best time to look for this comet, so here is my meager attempt.

Several things make a difference in how easy it is to see a comet.

The greatest uncertainty is how much dust and gas it will be giving off, as it is the sunlight illuminating these plumes that make the comet bright. This comet has already had outbursts that have made it temporarily 10 to 100 times brighter. It may be less likely such outbursts will occur as the comet moves closer to the Sun, but this is uncertain. As the astronomer David H. Levy said, “Comets are like cats; they have tails, and they do precisely what they want.”

My recommendation is to pay attention to the news and check regularly to see if the comet has had an outburst, as this may push its brightness into the visible range. In addition, I plan to look for the comet with binoculars, both on April 8 and 9 before moonlight begins to interfere and in the weeks before closest approach to the Sun on April 21. The next couple of paragraphs give my reasoning (which you are welcome to skip if you like).

We can’t predict outbursts, but we can predict other influences on the brightness of the comet.

If the gas and dust from the comet isn’t changing, an easy calculation is to assume the comet will scatter light uniformly in all directions, so that all you need to consider is the distance between the Sun and the comet and the distance between the comet and the Earth. This suggests that the comet will be at its brightest around April 20 and 21, 2024, when it will be passing its closest to the Sun and receiving (and reflecting towards Earth) the maximum amount of sunlight.

How easy the comet will be to see will also depend on how much glow there is from twilight (which depends on how far the Sun is below the horizon), whether (and how much) moonlight there is (increased moonlight will brighten the background sky), and how high the comet is above the horizon.

In the evenings, nautical twilight ends when the Sun reaches 12 degrees below the horizon (the estimate of when the horizon will be too dark for sailors at sea to use for navigation). In mid-to-late April (for the DC area), nautical twilight ends about 1 hour after sunset (the start and end of twilight I use throughout these Moon Missives is based on nautical twilight). Astronomical twilight is when the Sun is between 12 and 18 degrees below the horizon, when the sky looks dark but there can be enough residual glow that the faintest stars and diffuse objects (like nebulae, galaxies, faint meteors, and comets on the edge of visibility) may be masked. When the Sun is more than 18 degrees below the horizon the sky is about as dark as it is going to get.

When the Moon is in the sky it will add its light to the background brightness of the sky. The amount of light added will increase as the Moon waxes from a faint, thin crescent to a bright, nearly full Moon.

The evening of April 8, 2024, as nautical twilight ends (at 8:39 PM EDT), the crescent Moon will have already set and the comet will be 11.4 degrees above the west-northwestern horizon. The combined effect of the range from the Sun and the Earth gives a geometric estimate of 91% of the maximum brightness at its closest to the Sun in late April. By the time astronomical twilight ends (at 9:12 PM) the comet will still be 5 degrees above the horizon.

The evening of April 9, it might be interesting to see the comet and the thin, waxing crescent Moon low on the horizon as twilight ends, as the Moon will not be very bright and should not interfere much with seeing the comet. Nautical twilight will end (at 8:40 PM) with the Moon 4.2 degrees above the horizon and the comet above the Moon at 10.8 degrees above the horizon. The Moon will set (at 9:08 PM) just 5 minutes before astronomical twilight ends (at 9:13 PM), when the comet will be 4.6 degrees above the horizon. The distance-based estimate of brightness will have increased to 93% of the peak in late April.

Between April 10 and April 21, the geometric estimate of the brightness of the comet will gradually increase, but so will interference from the brightness of the waxing Moon, and the comet will shift closer to the horizon each evening. On the evening of April 21 the geometric brightness of the comet will be at its greatest, but the Moon will be 96% illuminated and the comet will be only 2.7 degrees above the horizon as nautical twilight ends. April 24 will be the last evening that the comet will be above the horizon before nautical twilight ends (at 8:57 PM).

Note that as our opportunity to view this comet from northern latitudes gets worse in late April, the opportunity for viewers in the Southern Hemisphere will get better.

Length of Daylight

As spring continues the daily periods of sunlight continue to lengthen, having changed at their fastest around the equinox on March 19, 2024. On Monday, March 25 (the day of the full Moon), morning twilight will begin at 6:05 AM, sunrise will be at 7:03 AM, solar noon will be at 1:14 PM when the Sun will reach its maximum altitude of 53.3 degrees, sunset will be at 7:25 PM, and evening twilight will end at 8:24 PM. By Tuesday, April 23 (the day of the full Moon after next), morning twilight will begin at 5:18 AM, sunrise will be at 6:20 AM, solar noon will be at 1:06 PM when the Sun will reach its maximum altitude of 64.0 degrees, sunset will be at 7:53 PM, and evening twilight will end at 8:56 PM.

Meteor Showers

Two meteor showers, the Lyrids (006 LYR) and the π-Puppids (137 PPU), will peak near the end of this lunar cycle but the nearly full Moon will interfere with seeing these meteors.

Evening Sky Highlights

On the evening of Sunday, March 24 (the evening before the full Moon), as twilight ends (at 8:22 PM EDT), the rising Moon will be 14 degrees above the east-southeastern horizon. The bright planet Jupiter will be 27 degrees above the western horizon and the planet Mercury will be to the lower right of Jupiter at 7 degrees above the horizon. The bright object appearing closest to overhead will be Pollux at 78 degrees above the south-southeastern horizon. Pollux is the 17th brightest star in our night sky and the brighter of the twin stars in the constellation Gemini the twins. Pollux is an orange tinted star about 34 light-years from Earth. It is not quite twice the mass of our Sun but about 9 times the diameter and 33 times the brightness.

As this lunar cycle progresses, the background of stars will appear to shift westward each evening (as the Earth moves around the Sun). Mercury will be dimming as it shifts toward the west-northwestern horizon, with April 3 the last evening it will be above the horizon as twilight ends and April 11 when it will pass between the Earth and the Sun, shifting from the evening to the morning sky. We are approaching the end of the opportunity to view Jupiter for this apparition, as it will shift lower towards the west-northwestern horizon each evening. The waxing Moon will pass by Jupiter on April 10, Pollux on April 14 and 15, Regulus on April 17 and 18, and Spica on April 22. By the evening of Tuesday, April 23 (the evening of the day of the full Moon after next), as twilight ends (at 8:56 PM EDT), the rising Moon will be 10 degrees above the east-southeastern horizon. The bright planet Jupiter will be 4 degrees above the west-northwestern horizon. The bright object appearing closest to overhead will be Regulus at 63 degrees above the southern horizon. Regulus is the 21st brightest star in our night sky and the brightest star in the constellation Leo the lion. The Arabic name for Regulus translates as “the heart of the lion.” Although we see Regulus as a single star, it is actually four stars (two pairs of stars orbiting each other). Regulus is about 79 light-years from us.

Morning Sky Highlights

On the morning of Monday, March 25 (the morning after the full Moon), as twilight begins (at 6:05 AM EDT), the setting Moon will be 12 degrees above the west-southwestern horizon. The planet Mars will be 3 degrees above the east-southeastern horizon. The bright object appearing closest to overhead will be the star Vega at 73 degrees above the eastern horizon. Vega is the brightest star in the constellation Lyra the lyre and is one of the three bright stars in the “Summer Triangle” along with Deneb and Altair. Vega is the 5th brightest star in our night sky, about 25 light-years from Earth, twice the mass of our Sun, and shines 40 times brighter than our Sun.

As this lunar cycle progresses, the background of stars will appear to shift westward each evening, while Mars will hover low on the east-southeastern horizon, drifting slightly to the left. The waning Moon will pass by Spica on March 26 and 27, and Antares on March 30. April 1 will be the first morning the planet Saturn will be above the eastern horizon as morning twilight begins, shifting towards Mars each morning. On April 6 the thin, waning crescent Moon will form a triangle with Saturn and Mars, but will be low on the east-southeastern horizon and difficult to see, with the Moon rising just 3 minutes before morning twilight begins. On April 10 Mars and Saturn will appear closest to each other, after which they will appear to separate. By the morning of Tuesday, April 23 (the morning of the day of the full Moon after next), as twilight begins (at 5:18 AM EDT), the setting full Moon will be 7 degrees above the west-southwestern horizon with the bright star Spica 2.5 degrees to the lower left of the Moon. The planet Mars will be 5 degrees above the eastern horizon and the planet Saturn will be 7 degrees above the east-southeastern horizon. The bright object appearing closest to overhead will still be the star Vega at 86 degrees above the eastern horizon.

Detailed Daily Guide

Here for your reference is a day-by-day listing of celestial events between now and the full Moon after next. The times and angles are based on the location of NASA Headquarters in Washington, DC, and some of these details may differ for where you are (I use parentheses to indicate times specific to the DC area).

Monday evening into Tuesday morning, March 18 to 19, 2024, the bright star Pollux (the brighter of the twin stars in the constellation Gemini the twins) will appear near the waxing gibbous Moon. Pollux will be 3.5 degrees to the left as twilight ends (at 8:16 PM EDT) and will shift clockwise around the Moon until the Moon sets on the northwestern horizon (at 4:42 AM) when Pollux will be 2 degrees to the upper right.

Tuesday evening, March 19, 2024, at 11:06 PM EDT, will be the vernal equinox, the astronomical end of winter and start of spring. For a location on the equator in the ocean north of Western New Guinea the Sun will pass directly overhead as it shifts from the Southern to the Northern Hemisphere.

Thursday morning, March 21, 2024, if you have a very clear view of the horizon about halfway between east and east-southeast, you might be able to see the planet Saturn less than a degree to the lower left of the bright planet Venus. Because of the glow of dawn this will be hard to see. Venus will shine brighter than any star, but Saturn will rise last (at 6:32 AM), 21 minutes after twilight begins (at 6:11 AM EDT), and will be only a little brighter than the star Pollux, the 17th brightest star in our night sky. You may need binoculars to see the pair, but make sure you stop looking well before sunrise.

The next morning, Friday, March 22, 2024, the planet Venus will have shifted to less than a degree to the left of the planet Saturn, with the pair rising together (at 6:29 AM EDT) 19 minutes after twilight begins (at 6:10 AM).

Thursday evening into Friday morning, March 21 to 22, 2024, the bright star Regulus will appear near the waxing gibbous Moon. As twilight ends (at 8:19 PM EDT) Regulus will be 5 degrees to the lower right of the Moon. Regulus will gradually shift closer to the Moon, initially swinging towards the left (appearing 4 degrees below and a little to the left) as the Moon reaches its highest (at 11:13 PM). At about 2:30 AM (when Regulus will be 3 degrees to the lower left) Regulus will switch and start swinging towards the right. As Regulus sets (at 5:58 AM) it will be 2.5 degrees below the Moon, with morning twilight beginning 12 minutes later (at 6:10 AM) and the Moon setting 3 minutes after that (at 6:13 AM).

Saturday night, March 23, 2024, at 11:46 AM EDT, the Moon will be at apogee, its farthest from the Earth for this orbit.

Sunday evening, March 24, 2024, at 5:59 PM EDT, will be when the planet Mercury reaches its greatest angular separation from the Sun as seen from Earth for this apparition (called greatest elongation). This will be the evening when the planet Mercury will appear highest above the western horizon (6.5 degrees) as twilight ends (at 8:22 PM).

As mentioned above, the next full Moon will be on Monday morning, March 25, 2024. The Moon will pass through the partial shadow of the Earth (called a penumbral lunar eclipse), beginning to enter the shadow at 12:53 AM EDT, reaching greatest eclipse at 3:13 AM when 96% of the Moon will be in partial shadow, and exiting the shadow at 5:32 AM. The slight dimming of the Moon will be difficult to notice. Since this is a little over a day after apogee (when the Moon is at its farthest from the Earth in its orbit) this will be a micromoon, the opposite of a supermoon. The Moon will appear full for about 3 days around this time, from Saturday evening through Tuesday morning.

Tuesday morning, March 26, 2024, the bright star Spica will appear near the full Moon. As the Moon reaches its highest in the sky for the night (at 1:52 AM EDT), Spica will be 8 degrees to the lower left of the Moon. By the time twilight begins (at 6:03 AM), Spica will be 6 degrees to the left of the Moon.

Tuesday evening into Wednesday morning, March 26 to 27, 2024, the Moon will have shifted to the other side of Spica. As the Moon rises on the east-southeastern horizon (at 8:59 PM EDT), Spica will be 3 degrees to the upper right of the Moon. By the time the Moon reaches its highest for the night (at 2:32 AM), Spica will be 5 degrees to the upper right. Spica will be 6 degrees to the lower right as twilight begins (at 6:02 AM).

Saturday morning, March 30, 2024, the bright star Antares will appear near the waning gibbous Moon. As Antares rises on the southeastern horizon (at 12:37 AM EDT) it will be 5 degrees to the lower left of the Moon. The Moon will reach its highest for the night (at 4:52 AM) with Antares 3 degrees to the left. As twilight begins (at 5:57 AM) Antares will be a little less than 3 degrees to the upper left of the Moon.

Monday morning, April 1, 2024, will be the first morning that the planet Saturn will be above the eastern horizon as twilight begins (at 5:55 AM EDT).

Monday night, April 1, 2024, the waning Moon will appear half-full as it reaches its last quarter at 11:15 PM EDT (when the Moon will be below the horizon).

Wednesday evening, April 3, 2024, will be the last evening that the planet Mercury will be above the horizon as twilight ends.

Saturday morning, April 6, 2024, if you have a very clear view of the east-southeastern horizon, you might be able to see the thin, waning crescent Moon near the planets Saturn and Mars. The Moon will rise last (at 5:42 AM EDT) just 3 minutes before twilight begins, with

Saturn 2 degrees to the upper left of the Moon and Mars 4 degrees to the upper right of the Moon.

You will need binoculars to see them in the glow of dawn, but on Sunday morning, April 7, 2024, the bright planet Venus will appear 3.5 degrees to the left of the very thin, waning crescent Moon low on the eastern horizon. Venus will rise last (at 6:14 AM EDT) 31 minutes after twilight begins and 29 minutes before sunrise. If you are using binoculars to scan for this pairing, be sure to stop looking well before any chance of sunrise (as using high powered lenses to focus intense sunlight directly into your eyes is a really bad idea).

Sunday afternoon, April 7, 2024, at 1:52 PM EDT, the Moon will be at perigee, its closest to the Earth for this orbit.

There will be an eclipse of the Sun on Monday, April 8, 2024. For information on the total solar eclipse (not visible from the Washington, DC area) see the summary section above. The Washington, DC area will only see a partial eclipse, starting at about 2:04 PM EDT, reaching its peak at about 3:21 PM when 88.9% of the Sun will be blocked by the Moon, and ending at 4:33 PM. Please pay attention to eye safety and do not look at the Sun directly without eclipse glasses. When the Moon is blocking most of the Sun, what remains will appear like a crescent. One of the interesting effects is that the sunlight through trees, etc., that we normally see as mottled sunlight (round blotches of light) is actually made up of many small images of the round Sun. When the Sun appears as a crescent these mottled patches will appear as many small crescents.

The eclipse will also be the new Moon, when the Moon passes between the Earth and the Sun and is not usually visible from the Earth (except when its silhouette causes an eclipse). The day of or the day after the new Moon marks the start of the new month for most lunisolar calendars. Sundown on Monday, April 8, 2024, marks the start of Nisan in the Hebrew calendar. Pesach or Passover begins on the 15th day of Nisan. The third month of the Chinese calendar starts on Tuesday, April 9, 2023.

Monday evening, April 8, 2024, as nautical or evening twilight ends (at 8:39 PM EDT), comet 12P/Pons-Brooks will be 11.4 degrees above the west-northwestern horizon. The crescent Moon will have already set, making this the last evening to see this comet without moonlight. By the time astronomical twilight ends (at 9:12 PM) the comet will still be 5 degrees above the horizon.

In the Islamic calendar the months traditionally start with the first sighting of the waxing crescent Moon. Many Muslim communities now follow the Umm al-Qura Calendar of Saudi Arabia, which uses astronomical calculations to start months in a more predictable way. This calendar predicts the holy month of Ramadan will end and Shawwāl will begin with sunset on Tuesday, April 9, 2024. Because of the religious significance of the end of Ramadan, Shawwāl is one of 4 months in the Islamic year where the start of the month is updated in the Umm al-Qura Calendar based upon the actual sighting of the crescent Moon. Starting with the sighting of the crescent Moon, the end of the Ramadan fast will be celebrated with Eid al-Fitr (the Feast of Breaking the Fast), a celebration lasting from 1 to 3 days.

Tuesday evening, April 9, 2024, it should be interesting to see the comet 12P/Pons-Brooks and the thin, waxing crescent Moon low on the horizon as twilight ends, as the Moon will not be very bright and should not interfere much with seeing the comet. Nautical or evening twilight will end (at 8:40 PM EDT) with the Moon 4.2 degrees above the horizon and the comet above the Moon at 10.8 degrees above the horizon. The Moon will set (at 9:08 PM) just 5 minutes before astronomical twilight ends (at 9:13 PM), when the comet will be 4.6 degrees above the horizon.

In the mornings throughout this lunar cycle the planets Saturn and Mars will appear near each other low on the east-southeastern horizon. Both will appear to shift higher each morning, with Saturn shifting more than Mars. Wednesday morning, April 10, 2024, will be when the pair will be at their closest. As twilight begins (at 5:38 AM EDT) the slightly brighter Saturn will appear 3 degrees above the horizon with Mars 0.5 degrees above Saturn.

Wednesday evening, April 10, 2024, the bright planet Jupiter will appear 4 degrees to the lower left of the waxing crescent Moon. The Moon will be 17 degrees above the west-northwestern horizon as twilight ends (at 8:41 PM EDT) and Jupiter will set first 77 minutes later (at 9:58 PM).

Thursday evening, April 11, 2024, the Pleiades star cluster will appear 6 degrees to the lower right of the waxing crescent Moon. The Moon will be 30 degrees above the western horizon as twilight ends (at 8:42 PM EDT) and the Pleiades will set first a little over 2 hours later (at about 11 PM).

Thursday evening, April 11, 2024, the planet Mercury will be passing between the Earth and the Sun, called inferior conjunction. Planets that orbit inside of the orbit of Earth can have two types of conjunctions with the Sun, inferior (when passing between the Earth and the Sun) and superior (when passing on the far side of the Sun). Mercury will be shifting from the evening sky to the morning sky and will begin emerging from the glow of the dawn on the eastern horizon later in April (depending upon viewing conditions).

Sunday evening into early Monday morning, April 14 to 15, 2024, the bright star Pollux (the brighter of the twins in the constellation Gemini the twins) will appear to the upper left of the waxing crescent Moon. As twilight ends (at 8:45 PM EDT) Pollux will be 8 degrees from the Moon. By the time the Moon sets on the west-northwestern horizon (at 2:39 AM), Pollux will be 5 degrees from the Moon.

Monday afternoon, April 15, 2024, the Moon will appear half-full as it reaches its first quarter at 3:13 PM EDT (when it will be daylight with the Moon visible in the eastern sky).

Monday evening into early Tuesday morning, April 15 to 16, 2024, the half-Moon will have shifted such that the bright star Pollux will appear to the lower right of the Moon. As twilight ends (at 8:45 PM EDT) Pollux will be 6 degrees from the Moon and the pair will appear to separate as the night progresses, reaching 8 degrees apart around 1:30 AM.

Wednesday evening into Thursday morning, April 17 to 18, 2024, the bright star Regulus will appear to the lower left of the waxing gibbous Moon. As twilight ends (at 8:49 PM EDT) Regulus will be 7.5 degrees from the Moon. When Regulus sets on the west-northwestern horizon (at 4:12 AM) it will be 4.5 degrees from the Moon.

Thursday evening into Friday morning, April 18 to 19, 2024, the waxing gibbous Moon will have shifted to the other side of the bright star Regulus. As twilight ends (at 8:50 PM EDT) Regulus will be 6 degrees to the upper right of the Moon. About 1 hour later (at 9:53 PM) the Moon will reach its highest for the night with Regulus 6 degrees to the right. Regulus will appear to rotate clockwise around and to separate from the Moon as the night progresses, reaching about 8 degrees to the lower right around 3 AM.

Friday night, April 19, 2024, at 10:09 PM EDT, the Moon will be at apogee, its farthest from the Earth for this orbit.

Friday morning, April 19, 2024, will be the first morning that the planet Mercury will rise more than 30 minutes before sunrise, a very rough estimate of the earliest it might start being visible in the glow of dawn on the eastern horizon. Mercury will be quite faint, but will brighten each morning as it presents a larger illuminated crescent towards the Earth. However, this will not be a favorable apparition for Mercury viewing, as even at its highest it will not rise before twilight begins.

Sunday, April 21, 2024 will be when the comet 12P/Pons-Brooks will be at its closest to the Sun, and the week or two before this might be a good time to look for this comet with binoculars. If the trail of gas and dust the comet is giving off doesn’t change significantly (a very big and uncertain “if”) then the brightness of the comet should gradually increase to a maximum on April 21. However, interference from the light of the waxing Moon will also increase beginning April 9, and the comet will shift closer to the horizon each evening. As twilight ends on April 21 (at 8:53 PM EDT) the Moon will be 96% illuminated and the comet will be only 2.7 degrees above the horizon. April 24 will be the last evening that the comet will be above the horizon before evening twilight ends (at 8:57 PM).

Monday evening into Tuesday morning, April 22 to 23, 2024, the bright star Spica will appear to the lower right of the full Moon. Spica will be a little more than 1 degree from the Moon as twilight ends. They will be at their closest a little before midnight. Spica will be 1 degree from the Moon as the Moon reaches its highest for the night (at 12:31 AM) and will be 2.5 degrees from the Moon as twilight begins (at 5:18 AM).

The full Moon after next will be Tuesday evening, April 23, 2024, at 7:49 PM EDT. This will be on Wednesday from the UK, Ireland, and Portugal eastward across Europe, Africa, Asia, and Australia to the International Date Line in the mid-Pacific. The Moon will appear full for about 3 days centered on this time, from Monday morning to Thursday morning.

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    • By NASA
      Space Station Astronauts Deliver a Christmas Message for 2024
    • By NASA
      Through NASA’s Artemis campaign, astronauts will land on the lunar surface and use a new generation of spacesuits and rovers as they live, work, and conduct science in the Moon’s South Pole region, exploring more of the lunar surface than ever before. Recently, the agency completed the first round of testing on three commercially owned and developed LTVs (Lunar Terrain Vehicle) from Intuitive Machines, Lunar Outpost, and Venturi Astrolab at NASA’s Johnson Space Center in Houston.NASA/Bill Stafford Venturi Astrolab’s FLEX, Intuitive Machines’ Moon RACER, and Lunar Outpost’s Eagle lunar terrain vehicle – three commercially owned and developed LTVs (Lunar Terrain Vehicle) – are pictured at NASA’s Johnson Space Center in Houston in this photo from Nov. 21, 2024.
      As part of an ongoing year-long feasibility study, each company delivered a static mockup of their vehicle to Johnson at the end of September, initiated rover testing in October and completed the first round of testing in December inside the Active Response Gravity Offload System (ARGOS) test facility. Lunar surface gravity is one-sixth of what we experience here on Earth, so to mimic this, ARGOS offers an analog environment that can offload pressurized suited subjects for various reduced gravity simulations.
      See how these LTVs were tested.
      Image credit: NASA/Bill Stafford
      View the full article
    • By NASA
      2024 Year in Review – Highlights from NASA in Silicon Valley
      by Tiffany Blake
      As NASA’s Ames Research Center in California’s Silicon Valley enters its 85th year since its founding, join us as we take a look back at some of our highlights of science, engineering, research, and innovation from 2024.

      Ames Arc Jets Play Key Role in Artemis I Orion Spacecraft Heat Shield Findings 

      A block of Avcoat undergoes testing inside an arc jet test chamber at NASA Ames. The test article, configured with both permeable (upper) and non-permeable (lower) Avcoat sections for comparison, helped to confirm understanding of the root cause of the loss of charred Avcoat material that engineers saw on the Orion spacecraft after the Artemis I test flight beyond the Moon. photo credit: NASA Researchers at Ames were part of the team tasked to better understand and identify the root cause of the unexpected char loss across the Artemis I Orion spacecraft’s heat shield. Using Avcoat material response data from Artemis I, the investigation team was able to replicate the Artemis I entry trajectory environment — a key part of understanding the cause of the issue — inside the arc jet facilities at NASA Ames. 

      Starling Swarm Completes Primary Mission

      The four CubeSat spacecraft that make up the Starling swarm have demonstrated success in autonomous operations, completing all key mission objectives. Image credit: NASA After ten months in orbit, the Starling spacecraft swarm successfully demonstrated its primary mission’s key objectives, representing significant achievements in the capability of swarm configurations in low Earth orbit, including distributing and sharing important information and autonomous decision making. 

      Another Step Forward for BioNutrients 

      Research scientists Sandra Vu, left, Natalie Ball, center, and Hiromi Kagawa, right, process BioNutrients production packs.Image credit: NASA NASA’s BioNutrients entered its fifth year in its mission to investigate how microorganisms can produce on-demand nutrients for astronauts during long-duration space missions. Keeping astronauts healthy is critical and as the project comes to a close, researchers have processed production packs on Earth on the same day astronauts processed production packs in space on the International Space Station to demonstrate that NASA can produce nutrients after at least five years in space, providing confidence it will be capable of supporting crewed missions to Mars.  

      Hyperwall Upgrade Helps Scientists Interpret Big Data

      The newly upgraded hyperwall visualization system provides four times the resolution of the previous system. Image credit: NASA/Brandon Torres Navarrete Ames upgraded its powerful hyperwall system, a 300-square foot wall of LCD screens with over a billion pixels to display supercomputer-scale visualizations of the very large datasets produced by NASA supercomputers and instruments. The hyperwall is just one way researchers can utilize NASA’s high-end computing technology to better understand their data and advance the agency’s missions and research. 

      Ames Contributions to NASA Artificial Intelligence Efforts 

      This landscape of “mountains” and “valleys” speckled with glittering stars is actually the edge of a nearby, young, star-forming region called NGC 3324 in the Carina Nebula. Captured in infrared light by NASA’s new James Webb Space Telescope, this image reveals for the first time previously invisible areas of star birth.Image credit: NASA/Bill Ingalls Ames contributes to the agency’s artificial intelligence work through ongoing research and development, agencywide collaboration, and communications efforts. This year, NASA announced David Salvagnini as its inaugural chief artificial intelligence officer and held the first agencywide town hall on artificial intelligence sharing how the agency is safely using and developing artificial intelligence to advance missions and research. 
      Advanced Composite Solar Sail System Successfully Launches, Deploys Sail

      Illustration: NASA NASA’s Advanced Composite Solar Sail System successfully launched from Māhia, New Zealand, in April, and successfully deployed its sail in August to begin mission operations. The small satellite represents a new future in solar sailing, using lightweight composite booms to support a reflective polymer sail that uses the pressure of sunlight as propulsion. 

      Understanding Our Planet 

      Samuel Suleiman, an instructor on NASA’s OCEANOS student training program, gathers loose corals to place around an endangered coral species to help attract fish and other wildlife, giving the endangered coral a better chance of survivalphoto credit: NASA/Milan Loiacono In 2024, Ames researchers studied Earth’s oceans and waterways from multiple angles – from supporting NASA’s Plankton, Aerosol, Cloud, ocean Ecosystem, or PACE, mission to bringing students in Puerto Rico experiences in oceanography and the preservation of coral reefs. Working with multiple partners, our scientists and engineers helped inform ecosystem management by joining satellite measurements of Earth with animal tracking data. In collaboration with the U.S. Geological Survey, a NASA team continued testing a specialized instrument package to stay in-the-know about changes in river flow rates. 

      Revealing the Mysteries of Asteroids in Our Solar System 

      Image credit: NASA Ames researchers used a series of supercomputer simulations to reveal a potential new explanation for how the moons of Mars may have formed: The first step, the findings say, may have involved the destruction of an asteroid. 
      Using NASA’s powerful James Webb Space Telescope, another Ames scientist helped reveal the smallest asteroids ever found in the main asteroid belt. 

      Ames Helps Emerging Space Companies ‘Take the Heat’

      A heat shield made by NASA is visible on the blunt, upward-facing side of a space capsule after its landing in the Utah desert.Image credit: Varda Space Industries/John Kraus A heat shield material invented and made at Ames helped to safely return a spacecraft containing the first product processed on an autonomous, free-flying, in-space manufacturing platform. February’s re-entry of the spacecraft from Varda Space Industries of El Segundo, California, in partnership with Rocket Lab USA of Long Beach, California, marked the first time a NASA-manufactured thermal protection material, called C-PICA (Conformal Phenolic Impregnated Carbon Ablator), ever returned from space. 

      Team Continues to Move Forward with Mission to Learn More about Our Star

      This illustration lays a depiction of the sun’s magnetic fields over an image captured by NASA’s Solar Dynamics Observatory on March 12, 2016.Image credit: NASA/SDO/AIA/LMSAL HelioSwarm’s swarm of nine spacecraft will provide deeper insights into our universe and offer critical information to help protect astronauts, satellites, and communications signals such as GPS. The mission team continues to work toward launching in 2029. 

      CAPSTONE Continues to Chart a New Path Around the Moon 

      CAPSTONE revealed in lunar Sunrise: CAPSTONE will fly in cislunar space – the orbital space near and around the Moon. The mission will demonstrate an innovative spacecraft-to-spacecraft navigation solution at the Moon from a near rectilinear halo orbit slated for Artemis’ Gateway.Illustration credit: NASA Ames/Daniel Rutter The microwave sized CubeSat, CAPSTONE, continues to fly in a cis-lunar near rectilinear halo orbit after launching in 2022. Flying in this unique orbit continues to pave the way for future spacecraft and Gateway, a Moon-orbiting outpost that is part of NASA’s Artemis campaign, as the team continues to collect data. 

      NASA Moves Drone Package Delivery Industry Closer to Reality 

      A drone is shown flying during a test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada in 2016. During the test, five drones simultaneously crossed paths, separated by different altitudes. Two drones flew beyond visual line of sight and three flew within line-of-sight of their operators. More UTM research followed, and it continues today. Image credit: NASA Ames/Dominic Hart NASA’s uncrewed aircraft system traffic management concepts paved the way for newly-approved package delivery drone flights in the Dallas area. 

      NASA’s uncrewed aircraft system traffic management concepts paved the way for newly-approved package delivery drone flights in the Dallas area. 

      NASA Technologies Streamline Air Traffic Management Systems 

      This image shows an aviation version of a smartphone navigation app that makes suggestions for an aircraft to fly an alternate, more efficient route. The new trajectories are based on information available from NASA’s Digital Information Platform and processed by the Collaborative Departure Digital Rerouting tool.Illustration credit: NASA Managing our busy airspace is a complex and important issue, ensuring reliable and efficient movement of commercial and public air traffic as well as autonomous vehicles. NASA, in partnership with AeroVironment and Aerostar, demonstrated a first-of-its-kind air traffic management concept that could pave the way for aircraft to safely operate at higher altitudes. The agency also saw continued fuel savings and reduction in commercial flight delays at Dallas Fort-Worth Airport, thanks to a NASA-developed tool that allows flight coordinators to identify more efficient, alternative takeoff routes.

      Small Spacecraft Gathers Big Solar Storm Data from Deep Space 

      Illustration of NASA’s BioSentinel spacecraft as it enters a heliocentric orbit.Illustration credit: NASA Ames/Daniel Rutter BioSentinel – a small satellite about the size of a cereal box – is currently more than 30 million miles from Earth, orbiting our Sun. After launching aboard NASA’s Artemis I more than two years ago, BioSentinel continues to collect valuable information for scientists trying to understand how solar radiation storms move through space and where their effects – and potential impacts on life beyond Earth – are most intense. In May 2024, the satellite was exposed to a coronal mass ejection without the protection of our planet’s magnetic field and gathered measurements of hazardous solar particles in deep space during a solar storm. 

      NASA, FAA Partner to Develop New Wildland Fire Technologies

      Artist’s rendering of remotely piloted aircraft providing fire suppression, monitoring and communications capabilities during a wildland fire. Illustration credit: NASA NASA researchers continued to develop and test airspace management technologies to enable remotely-piloted aircraft to fight and monitor wildland fires 24 hours a day.  
      The Advanced Capabilities for Emergency Response Operations (ACERO) project seeks to use drones and advanced aviation technologies to improve wildland fire coordination and operations. 

      NASA and Forest Service Use Balloon to Help Firefighters Communicate

      The Aerostar Thunderhead balloon carries the STRATO payload into the sky to reach the stratosphere for flight testing. The balloon appears deflated because it will expand as it rises to higher altitudes where pressures are lower.Image credit: Colorado Division of Fire Prevention and Control Center of Excellence for Advanced Technology Aerial Firefighting/Austin Buttlar  The Strategic Tactical Radio and Tactical Overwatch (STRATO) technology is a collaborative effort to use high-altitude balloons to improve real-time communications among firefighters battling wildland fires. Providing cellular communication from above can improve firefighter safety and firefighting efficiency.

      A Fully Reimagined Visitor Center 

      The NASA Ames Visitor Center includes exhibits and activities, sharing the work of NASA in Silicon Valley with the public.Image credit: NASA Ames/Don RIchey The NASA Ames Visitor Center at Chabot Space & Science Center in Oakland, California includes a fully reimagined 360-degree experience, featuring new exhibits, models, and more. An interactive exhibit puts visitors in the shoes of a NASA Ames scientist, designing and testing rovers, planes, and robots for space exploration. 

      Ames Collaborations in the Community

      Former NASA astronauts Yvonne Cagle and Kenneth Cockrell pose with Eli Toribio and Rhydian Daniels at the University of California, San Francisco Bakar Cancer Hospital. Patients gathered to meet the astronauts and learn more about human spaceflight and NASA’s cancer research effortsImage credit: NASA Ames/Brandon Torres Navarrete NASA astronauts, scientists, and researchers, and leadership from the University of California, San Francisco (UCSF) met with cancer patients and gathered in a discussion about potential research opportunities and collaborations as part of President Biden and First Lady Jill Biden’s Cancer Moonshot initiative on Oct. 4. During the visit with patients, NASA astronaut Yvonne Cagle and former astronaut Kenneth Cockrell answered questions about spaceflight and life in space. 
      Ames and the University of California, Berkeley, expanded their partnership, organizing workshops to exchange on their areas of technical expertise, including in Advanced Air Mobility, and to develop ideas for the Berkeley Space Center, an innovation hub proposed for development at Ames’ NASA Research Park. Under a new agreement, NASA also will host supercomputing resources for UC Berkeley, supporting the development of novel computing algorithms and software for a wide variety of scientific and technology areas.

      NASA’s Ames Research Center Celebrates 85 Years of Innovation
      by Rachel Hoover
      Ames Research Center in California’s Silicon Valley pre-dates a lot of things. The center existed before NASA – the very space and aeronautics agency it’s a critical part of today. And of all the marvelous advancements in science and technology that have fundamentally changed our lives over the last 85 years since its founding, one aspect has remained steadfast; an enduring commitment to what’s known by some on-center simply as, “an atmosphere of freedom.” 
      The NACA Ames laboratory in 1944.Image credit: NASA Years before breaking ground at the site that would one day become home to the world’s preeminent wind tunnels, supercomputers, simulators, and brightest minds solving some of the world’s toughest challenges, Joseph Sweetman Ames, the center’s namesake, described a sentiment that would guide decades of innovation and research: 
      “My hope is that you have learned or are learning a love of freedom of thought and are convinced that life is worthwhile only in such an atmosphere,” he said in an address to the graduates of Johns Hopkins University in June 1935.
      That spirit and the people it attracted and retained are a crucial part of how Ames, along with other N.A.C.A. research centers, ultimately made technological breakthroughs that enabled humanity’s first steps on the Moon, the safe return of spacecraft through Earth’s atmosphere, and many other discoveries that benefit our day-to-day lives.
      Russell Robinson momentarily looks to the camera while supervising the first excavation at what would become Ames Research Center.Image credit: NACA “In the context of my work, an atmosphere of freedom means the freedom to pursue high-risk, high-reward, innovative ideas that may take time to fully develop and — most importantly — the opportunity to put them into practice for the benefit of all,” said Edward Balaban, a researcher at Ames specializing in artificial intelligence, robotics, and advanced mission concepts.
      Balaban’s career at Ames has involved a variety of projects at different stages of development – from early concept to flight-ready – including experimenting with different ways to create super-sized space telescopes in space and using artificial intelligence to help guide the path a rover might take to maximize off-world science results. Like many Ames researchers over the years, Balaban shared that his experience has involved deep collaborations across science and engineering disciplines with colleagues all over the center, as well as commercial and academic partners in Silicon Valley where Ames is nestled and beyond. This is a tradition that runs deep at Ames and has helped lead to entirely new fields of study and seeded many companies and spinoffs.
      Before NASA, Before Silicon Valley: The 1939 Founding of Ames Aeronautical Laboratory “In the fields of aeronautics and space exploration the cost of entry can be quite high. For commercial enterprises and universities pursuing longer term ideas and putting them into practice often means partnering up with an organization such as NASA that has the scale and multi-disciplinary expertise to mature these ideas for real-world applications,” added Balaban.
      “Certainly, the topics of inquiry, the academic freedom, and the benefit to the public good are what has kept me at Ames,” reflected Ross Beyer, a planetary scientist with the SETI Institute at Ames. “There’s not a lot of commercial incentive to study other planets, for example, but maybe there will be soon. In the meantime, only with government funding and agencies like NASA can we develop missions to explore the unknown in order to make important fundamental science discoveries and broadly share them.”
      For Beyer, his boundary-breaking moment came when he searched – and found – software engineers at Ames capable and passionate about open-source software to generate accurate, high-resolution, texture-mapped, 3D terrain models from stereo image pairs. He and other teams of NASA scientists have since applied that software to study and better understand everything from changes in snow and ice characteristics on Earth, as well as features like craters, mountains, and caves on Mars or the Moon. This capability is part of the Artemis campaign, through which NASA will establish a long-term presence at the Moon for scientific exploration with commercial and international partners. The mission is to learn how to live and work away from home, promote the peaceful use of space, and prepare for future human exploration of Mars. 
      “As NASA and private companies send missions to the Moon, they need to plan landing sites and understand the local environment, and our software is freely available for anyone to use,” Beyer said. “Years ago, our management could easily have said ‘No, let’s keep this software to ourselves; it gives us a competitive advantage.’ They didn’t, and I believe that NASA writ large allows you to work on things and share those things and not hold them back.” 
      When looking forward to what the next 85 years might bring, researchers shared a belief that advancements in technology and opportunities to innovate are as expansive as space itself, but like all living things, they need a healthy atmosphere to thrive. Balaban offered, “This freedom to innovate is precious and cannot be taken for granted. It can easily fall victim if left unprotected. It is absolutely critical to retain it going forward, to ensure our nation’s continuing vitality and the strength of the other freedoms we enjoy.”

      Ames Aeronautical Laboratory.Image credit: NACA Today Marks the Retirement of the Astrogram Newsletter
      by Astrid Albaugh
      For 66 years, the Astrogram has told the story of NASA’s Ames Research Center. Over those six-plus decades, the newsletter has documented hundreds of missions led by Ames, the progression of Hangar One’s reclamation, space shuttle launches with Ames’ payloads aboard them, countless VIP visits, and everything in between.
      Ames published the first edition of the Astrogram in October 1958, coinciding with the transition of the center from its original incarnation as the National Advisory Committee for Aeronautics Ames Aeronautical Laboratory to a National Aeronautics and Space Administration (NASA) research center.
      The newsletter has evolved over time, alongside the center. From October 1958 through January 2016, the Astrogram was published in print, before a digital edition was developed. In January 2016, the Astrogram transitioned to a digital-only format. Below are examples of some of the Astrogram issues from over the years. More are forthcoming from 1998 and prior once they are retrieved from the archives.
      October 2014 Astrogram September 2010 Astrogram I have served as the editor of the Astrogram since February 1998. Over the past quarter century, it has been an interesting, and sometimes quite challenging, task for me to capture the breadth and depth of Ames’s story and ensure that we always published the newsletter on time. I still remember trekking over to the center’s imaging office to review the physical negatives and images that the Ames photographers had taken of events onsite and select the most compelling photos. I used a very early version of visual design software to craft the layout. When the paper was completed, I’d file it onto a CD and then hand it to the courier who would drive from the San Francisco printshop to pick it up from me. Once and awhile, someone would request to have an additional feature added, requiring multiple trips up the 101 and back. Sometimes I’d come in on the weekends to work on the paper, due to late submissions, much to the chagrin of my kids.
      July 2007 Astrogram It has been a pleasure serving as the editor over the past quarter century, almost as many years as my kids are old. A person once asked me if I had changed my name to Astrid since it’s so like the word Astrogram. Any relationship between the newsletter and my name is simply serendipity. I have enjoyed being behind the scenes, mostly working diligently at my computer. Many at Ames know my name because of the newsletter but may have never met me in person. It’s been amusing sometimes when I encounter someone who can’t put a finger as to why they knew my name but didn’t recognize me standing in front of them. Their usual response when they realized why they know me was, “Ah, Astrid of the Astrogram.”
      March 20, 1998 Astrogram Just as NASA innovates, the content of the Astrogram has to innovate as well. Many of the stories that you used to read in the Astrogram, you can now find on our NASA Ames web page here. If you would like to access past, archived issues of the Astrogram, going back to 1958, please consult the Ames Research Center Archives. I will continue to help tell Ames’s story, just using new platforms.
      Whether this is your first issue or you have been an Astrogram supporter for decades, thank you for reading!
      – Astrid of the Astrogram officially signing off


      View the full article
    • By NASA
      A method for evaluating thermophysical properties of metal alloys

      Simulation of the solidification of metal alloys, a key step in certain industrial processes, requires reliable data on their thermophysical properties such as surface tension and viscosity. Researchers propose comparing predictive models with experimental outcomes as a method to assess these data.

      Scientists use data on surface tension and viscosity of titanium-based alloys in industrial processes such as casting and crystal growth. Non-Equilibrium Solidification, Modelling for Microstructure Engineering of Industrial Alloys, an ESA (European Space Agency) investigation, examined the microstructure and growth of these alloys using the station’s Electromagnetic Levitator. This facility eliminates the need for containers, which can interfere with experiment results.
      European Space Agency (ESA) astronaut Alexander Gerst is shown in the Columbus module of the International Space Station during the installation of the Electromagnetic Levitator.ESA/Alexander Gerst Overview of techniques for measuring thermal diffusion

      Researchers present techniques for measuring thermal diffusion of molecules in a mixture. Thermal diffusion is measured using the Soret coefficient – the ratio of movement caused by temperature differences to overall movement within the system. This has applications in mineralogy and geophysics such as predicting the location of natural resources beneath Earth’s surface.

      A series of ESA investigations studied diffusion, or how heat and particles move through liquids, in microgravity. Selectable Optical Diagnostics Instrument-Influence of VIbrations on DIffusion of Liquids examined how vibrations affect diffusion in mixtures with two components and SODI-DCMIX measured more-complex diffusion in mixtures of three or more components. Understanding and predicting the effects of thermal diffusion has applications in various industries such as modeling of underground oil reservoirs.
      NASA astronaut Kate Rubins works on Selectable Optical Diagnostics Instrument Experiment Diffusion Coefficient Mixture-3 (SODI) DCMix-3 installation inside the station’s Microgravity Science Glovebox.JAXA (Japan Aerospace Exploration Agency)/Takuya Onishi Research validates ferrofluid technology

      Researchers validated the concept of using ferrofluid technology to operate a thermal control switch in a spacecraft. This outcome could support development of more reliable and long-lasting spacecraft thermal management systems, increasing mission lifespan and improving crew safety.

      Überflieger 2: Ferrofluid Application Research Goes Orbital analyzed the performance of ferrofluids, a technology that manipulates components such as rotors and switches using magnetized liquids and a magnetic field rather than mechanical systems, which are prone to wear and tear. This technology could lower the cost of materials for thermal management systems, reduce the need for maintenance and repair, and help avoid equipment failure. The paper discusses possible improvements to the thermal switch, including optimizing the geometry to better manage heat flow.
      A view of the Ferrofluid Application Research Goes Orbital investigation hardware aboard the International Space Station. UAE (United Arab Emirates)/Sultan AlneyadiView the full article
    • By NASA
      4 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      NASA/Quincy Eggert NASA’s Armstrong Flight Research Center in Edwards, California, is preparing today for tomorrow’s mission. Supersonic flight, next generation aircraft, advanced air mobility, climate changes, human exploration of space, and the next innovation are just some of the topics our researchers, engineers, and mission support teams focused on in 2024.
      NASA Armstrong began 2024 with the public debut of the X-59 quiet supersonic research aircraft. Through the unique design of the X-59, NASA aims to reduce the sonic boom to make it much quieter, potentially opening the future to commercial supersonic flight over land. Throughout the first part of the year, NASA and international researchers studied air quality across Asia as part of a global effort to better understand the air we breathe. Later in the year, for the first time, a NASA-funded researcher conducted an experiment aboard a commercial suborbital rocket, studying how changes in gravity during spaceflight affect plant biology.
      Here’s a look at more NASA Armstrong accomplishments throughout 2024:
      Our simulation team began work on NASA’s X-66 simulator, which will use an MD-90 cockpit and allow pilots and engineers to run real-life scenarios in a safe environment. NASA Armstrong engineers completed and tested a model of a truss-braced wing design, laying the groundwork for improved commercial aircraft aerodynamics. NASA’s Advanced Air Mobility mission and supporting projects worked with industry partners who are building innovative new aircraft like electric air taxis. We explored how these new designs may help passengers and cargo move between and inside cities efficiently. The team began testing with a custom virtual reality flight simulator to explore the air taxi ride experience. This will help designers create new aircraft with passenger comfort in mind. Researchers also tested a new technology that will help self-flying aircraft avoid hazards. A NASA-developed computer software tool called OVERFLOW helped several air taxi companies predict aircraft noise and aerodynamic performance. This tool allows manufacturers to see how new design elements would perform, saving the aerospace industry time and money. Our engineers designed a camera pod with sensors at NASA Armstrong to help advance computer vision for autonomous aviation and flew this pod at NASA’s Kennedy Space Center in Florida. NASA’s Quesst mission marked a major milestone with the start of tests on the engine that will power the quiet supersonic X-59 experimental aircraft. In February and March, NASA joined international researchers in Asia to investigate pollution sources. The now retired DC-8 and NASA Langley Gulfstream III aircraft collected air measurements over the Philippines, South Korea, Malaysia, Thailand, and Taiwan. Combined with ground and satellite observations, these measurements continue to enrich global discussions about pollution origins and solutions. The Gulfstream IV joined NASA Armstrong’s fleet of airborne science platforms. Our teams modified the aircraft to accommodate a next-generation science instrument that will collect terrain information of the Earth in a more capable, versatile, and maintainable way. The ER-2 and the King Air supported the development of spaceborne instruments by testing them in suborbital settings. On the Plankton, Aerosol, Cloud, ocean Ecosystem Postlaunch Airborne eXperiment mission (PACE-PAX), the ER-2 validated data collected by the PACE satellite about the ocean, atmosphere, and surfaces. Operating over several countries, researchers onboard NASA’s C-20A collected data and images of Earth’s surface to understand global ecosystems, natural hazards, and land surface changes. Following Hurricane Milton, the C-20A flew over affected areas to collect data that could help inform disaster response in the future. We also tested nighttime precision landing technologies that safely deliver spacecraft to hazardous locations with limited visibility. With the goal to improve firefighter safety, NASA, the U.S. Forest Service, and industry tested a cell tower in the sky. The system successfully provided persistent cell coverage, enabling real-time communication between firefighters and command posts. Using a 1960s concept wingless, powered aircraft design, we built and tested an atmospheric probe to better and more economically explore giant planets. NASA Armstrong hosted its first Ideas to Flight workshop, where subject matter experts shared how to accelerate research ideas and technology development through flight. These are just some of NASA Armstrong’s many innovative research efforts that support NASA’s mission to explore the secrets of the universe for the benefit of all.
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      Last Updated Dec 20, 2024 EditorDede DiniusContactSarah Mannsarah.mann@nasa.govLocationArmstrong Flight Research Center Related Terms
      Armstrong Flight Research Center Advanced Air Mobility Aeronautics C-20A DC-8 Earth Science ER-2 Flight Opportunities Program Quesst (X-59) Sustainable Flight Demonstrator Explore More
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