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By NASA
5 Min Read NASA Langley’s Legacy of Landing
The first image of the Moon taken by the cameras on the Lunar Orbiter in 1966. Credits: NASA Landing safely on the surface of another planetary body, like the Moon or Mars, is one of the most important milestones of any given space mission. From the very beginning, NASA’s Langley Research Center has been at the heart of the entry, descent and landing (EDL) research that enables our exploration. Today, NASA Langley’s legacy of landing continues at the forefront of present day lunar missions and as NASA prepares for future travel to more distant worlds.
Project Mercury: 1958
Project Mercury was the United States’ first human-in-space program, led by NASA’s Space Task Group located at NASA Langley. There were five major programs of study and experimentation.
An airdrop study that helped us understand the characteristics of the Mercury capsule as it returned to Earth. A group of study focused on the escape systems, ultimately becoming known as the launch abort system. Exhaustive wind-tunnel studies of the blunt-nosed capsule design and its aerodynamic stability at various altitudes and speeds and angles of reentry, all with a focus on making the capsule safe and stable. A study on the problem of landing impact, resulting in the development of absorption systems that minimized the shock of impact to the capsule’s pilot. Studies into the use of drogue parachutes and their characteristics at high altitudes and speeds, ensuring that they would be able to stabilize and slow the capsule’s descent for a safe landing. All of this research went on to inform the subsequent Gemini and Apollo programs. All of this research went on to inform the subsequent Gemini and Apollo programs.
Apollo Program: 1962
In 1961, President John F. Kennedy committed to putting Americans on the surface of the Moon and shortly after that historic declaration, NASA’s Apollo program was born. In the years that followed, the original team of NASA astronauts completed their basic training at NASA Langley’s Lunar Landing Research Facility (LLRF). When Apollo 11 successfully landed the first humans on the Moon in 1969, NASA Langley had played a pivotal role in the monumental success.
Lunar Orbiter: 1966
The Lunar Orbiter missions launched with the purpose of mapping the lunar surface and identifying potential landing sites ahead of the Apollo landings. From 1966 to 1967, the five successful Lunar Orbiter missions, led and managed by Langley Research Center, resulted in 99% of the moon photographed and a suitable site selected for the upcoming human landings.
Viking: 1976
After the success of Apollo, NASA set its sights further across the solar system to Mars. Two Viking missions aimed to successfully place landers on the Red Planet and capture high resolution images of the Martian surfaces, assisting in the search for life. Langley Research Center was chosen to lead this inaugural Mars mission and went on to play key roles in the missions to Mars that followed.
HIAD: 2009 – Present
Successful landings on Mars led to more ambitious dreams of landing larger payloads, including those that could support future human exploration. In order to land those payloads safely, a new style of heat shield would be needed. Hypersonic Inflatable Aerodynamic Decelerator (HIAD) technology was positioned as an answer to the payload problem, enabling missions to use inflatable heat shields to slow down and protect a payload as it enters a planet’s atmosphere at hypersonic speeds.
IRVE – 2009-2012
Two successful Inflatable Reentry Vehicle Experiments (IRVE) proved the capability of inflatable heat shield technology and opened the door for larger iterations.
LOFTID – 2022
The Low Earth Orbit Flight Test of an Inflatable Decelerator (LOFTID) followed in the footsteps of its predecessor IRVE with a larger aeroshell that could be deployed to a scale much larger than the shroud. The 2022 successful test of this technology further proved the capability of HIAD technology.
MEDLI 1 and 2: 2012 & 2020
As a part of the Mars Science Laboratory (MSL) mission, NASA Langley’s Mars Entry, Descent and Landing Instrument (MEDLI) was designed to gather data from the MSL entry vehicle’s heatshield during its entry and descent to the surface of Mars. MEDLI2 expanded on that groundbreaking data during the Mars 2020 mission which safely landed the Perseverance rover after successfully entering the planet’s arid atmosphere, and enabling improvements on the design for future entry systems.
Curiosity Rover
Curiosity was the largest and most capable rover ever sent to Mars when it launched in 2011. Leading up the mission, Langley engineers performed millions of simulations of the entry, descent and landing phase — or the so-called “Seven Minutes of Terror” — that determines success or failure. Curiosity continues to look for signs that Mars once was – or still is – a habitable place for life as we know it.
CLPS: 2023 – Present
The Commercial Lunar Payload Services initiative takes the Artemis mission further by working with commercial partners to advance the technology needed to return humans to the Moon and enable humanity to explore Mars.
NDL
Navigation Doppler Lidar (NDL) technology, developed at Langley Research Center, uses lasers to assist spacecraft in identifying safe locations to land. In 2024, NDL flew on the Intuitive Machines’ uncrewed Nova-C lander, with its laser instruments designed to measure velocity and altitude to within a few feet. While NASA planetary landers have traditionally relied on radar and used radio waves, NDL technology has proven more accurate and less heavy, both major benefits for cost and space savings as we continue to pursue planetary missions.
SCALPSS
Like Lunar Orbiter and the Viking missions before it, Stereo Cameras for Lunar Plume Surface Studies (SCALPSS) set out to better understand the surface of another celestial body. These cameras affixed to the bottom of a lunar lander focus on the interaction between the lander’s rocket plumes and the lunar surface. The SCALPSS 1.1 instrument captured first-of-its-kind imagery as the engine plumes of Firefly’s Blue Ghost lander reached the Moon’s surface. These images will serve as key pieces of data as trips to the Moon increase in the coming years.
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Angelique Herring
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Last Updated Apr 03, 2025 EditorAngelique HerringContactJoseph Scott Atkinsonjoseph.s.atkinson@nasa.govLocationNASA Langley Research Center Related Terms
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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Astronauts Victor Glover and Christina Koch tour the Arc Jet Facility at NASA’s Ames Research Center, learning more about the testing equipment’s capabilities to analyze thermal protection systems from George Raiche, thermophysics facilities branch chief at Ames.NASA/Donald Richey As NASA prepares to send astronauts to the Moon aboard the Orion spacecraft, research, testing, and development at NASA’s Ames Research Center in California’s Silicon Valley has played a critical role.
Recently, Ames welcomed Artemis II astronauts Christina Koch and Victor Glover and Orion leaders Debbie Korth, deputy program manager, and Luis Saucedo, deputy crew and service module manager, to tour Ames facilities that support the Orion Program and celebrate the achievements of employees.
The group started their visit at the Arc Jet Complex, where researchers use extremely hot, high-speed gases to simulate the intense heat of atmospheric reentry before visiting the Sensors & Thermal Protection Systems Advanced Research Laboratories. The team works to develop sensors and flight instrumentation that measure heat shield response throughout a mission.
These systems were used to develop and test Orion’s thermal protection system to ensure the safety of astronauts during future missions. After the successful return of the Artemis I Orion spacecraft, Ames research was essential when analyzing unexpected charring loss on the heat shield.
Debbie Korth, Orion deputy program manager, presents awards to the Ames workforce at the Orion Circle of Excellence Awards Ceremony, while astronauts Christina Koch and Victor Glover look on.NASA/Donald Richey The visit culminated in an award ceremony to honor employees with outstanding performance and a legacy of service to the Orion Program. Thirty-two employees were honored for their individual or team contributions.
“The Ames workforce has played an important role in developing, testing, and validating the Orion spacecraft’s thermal protection system as well as supporting its software and guidance, navigation, and control,” said Eugene Tu, NASA Ames center director. “I’m pleased to see their contributions recognized and celebrated by program leadership and two of the astronauts whose safety and success were in mind when ensuring these systems are safe, reliable, and the highest quality possible.”
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Last Updated Apr 02, 2025 Related Terms
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By NASA
The Roscosmos Soyuz MS-27 spacecraft will launch from the Baikonur Cosmodrome in Kazakhstan to the International Space Station with (pictured left to right) NASA astronaut Jonny Kim and Roscosmos cosmonauts Sergey Ryzhikov and Alexey Zubritsky.Credit: Gagarin Cosmonaut Training Center NASA astronaut Jonny Kim will launch aboard the Roscosmos Soyuz MS-27 spacecraft to the International Space Station, accompanied by cosmonauts Sergey Ryzhikov and Alexey Zubritsky, where they will join the Expedition 72/73 crew in advancing scientific research.
Kim, Ryzhikov, and Zubritsky will lift off at 1:47 a.m. EDT Tuesday, April 8 (10:47 a.m. Baikonur time) from the Baikonur Cosmodrome in Kazakhstan.
Watch live launch and docking coverage on NASA+. Learn how to watch NASA content through a variety of platforms.
After a two-orbit, three-hour trajectory to the station, the spacecraft will dock automatically to the station’s Prichal module at approximately 5:03 a.m. Shortly after, hatches will open between Soyuz and the space station.
Once aboard, the trio will join NASA astronauts Nichole Ayers, Anne McClain, and Don Pettit, JAXA (Japan Aerospace Exploration Agency) astronaut Takuya Onishi, and Roscosmos cosmonauts Alexey Ovchinin, Kirill Peskov, and Ivan Vagner.
NASA’s coverage is as follows (all times Eastern and subject to change based on real-time operations):
Tuesday, April 8
12:45 a.m. – Launch coverage begins on NASA+.
1:47 a.m. – Launch
4:15 a.m. – Rendezvous and docking coverage begins on NASA+.
5:03 a.m. – Docking
7 a.m. – Hatch opening and welcome remarks coverage begins on NASA+.
7:20 a.m. – Hatch opening
The trio will spend approximately eight months aboard the orbital laboratory as Expedition 72 and 73 crew members before returning to Earth in December. This will be the first flight for Kim and Zubritsky, and the third for Ryzhikov.
For more than two decades, people have lived and worked continuously aboard the International Space Station, advancing scientific knowledge and making research breakthroughs that are not possible on Earth. The station is a critical testbed for NASA to understand and overcome the challenges of long-duration spaceflight and to expand commercial opportunities in low Earth orbit. As commercial companies focus on providing human space transportation services and destinations as part of a robust low Earth orbit economy, NASA is focusing more resources on deep space missions to the Moon as part of the Artemis campaign in preparation for future human missions to Mars.
Learn more about International Space Station research and operations at:
https://www.nasa.gov/station
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Sandra Jones
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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
The International Space Station is pictured from the SpaceX Dragon spacecraft by a Crew-8 member shortly after undocking from the Harmony module’s space-facing port as the orbital outpost was soaring 272 miles above the cloudy Patagonia region of South America.NASA NASA is seeking proposals for two new private astronaut missions to the International Space Station, targeted for 2026 and 2027, as the agency continues its commitment to expanding access to space. These private missions enable American commercial companies to further develop capabilities and support a continuous human presence in low Earth orbit.
“We are in an incredible time for human spaceflight, with more opportunities to access space and grow a thriving commercial economy in low Earth orbit,” said Dana Weigel, program manager for the International Space Station at NASA’s Johnson Space Center in Houston. “NASA remains committed to supporting this expansion by leveraging our decades of expertise to help industry gain the experience needed to train and manage crews, conduct research, and develop future destinations. Private astronaut missions are a key part of this effort, providing companies with hands-on opportunities to refine their capabilities and build partnerships that will shape the future of low Earth orbit.”
The new flight opportunities will be the fifth and sixth private astronaut missions to the orbiting laboratory coordinated by NASA. The first three missions were accomplished by Axiom Space in April 2022, May 2023, and January 2024, with a fourth scheduled for no earlier than May 2025.
Each of the new missions may be docked to the space station for up to 14 days. Specific dates depend on spacecraft traffic at the space station and in-orbit activity planning and constraints. Private astronaut missions must be brokered by a U.S. entity and use U.S. transportation spacecraft that meet NASA’s International Space Station visiting vehicle requirements, policies, and procedures. For additional details, refer to Focus Area 4A of NASA Research Announcement (NRA) NNJ13ZBG001N.
Proposals are due by 5 p.m. EDT on Friday, May 30, 2025.
For solicitation information, visit:
https://www.nasa.gov/johnson/jsc-procurement/pam
For more than two decades, people have lived and worked continuously aboard the International Space Station, advancing scientific knowledge and demonstrating new technologies, making research breakthroughs not possible on Earth. The station is a critical testbed for NASA to understand and overcome the challenges of long-duration spaceflight and to expand commercial opportunities in low Earth orbit. As commercial companies focus on providing human space transportation services and destinations as part of a robust low Earth orbit economy, NASA’s Artemis campaign is underway at the Moon, where the agency is preparing for future human exploration of Mars.
Learn more about the International Space Station at:
https://www.nasa.gov/station
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By NASA
Skywatching Science Skywatching What’s Up: April 2025… Skywatching Home What’s Up What to See Tonight Meteor Showers Eclipses Moon Guide More Tips & Guides Skywatching FAQ Night Sky Network April (Meteor) Showers and See a City of Stars!
Enjoy observing planets in the morning and evening sky, look for Lyrid meteors, and hunt for the “faint fuzzy” wonder that is the distant and ancient city of stars known as globular cluster M3.
Skywatching Highlights
All Month – Planet Visibility:
Mercury: Visible for a few days in the second half of April, extremely low in the east before sunrise. Venus: Rising low in the east in the hour before dawn. Mars: Bright and easy to view after dark all month. Setting a couple of hours after midnight. Jupiter: Bright and easy to spot in the west after dark, setting a couple of hours after sunset. Saturn: Visible low in the east below Venus, before dawn in the last two weeks of April. Daily Highlights:
April 1 & 30 – Jupiter & Crescent Moon: Find the charming pair in the west as the sky darkens, setting about 3 hours after sunset.
April 4 & 5 – Mars & Moon: The Moon, around its first quarter phase, appears near Mars in the sky for two nights.
April 24-25 – Grouping of the Moon & Three Planets: Find Venus, Saturn, and the crescent moon gathered low in the east as dawn warms the morning sky. Mercury is also visible below them for those with a clear view to the horizon.
All month – Venus: Earth’s hothouse twin planet has made the shift from an evening object to a morning sight. You’ll notice it rising low in the east before dawn, looking a little higher each morning through the month.
All month – Mars: Looking bright and reddish in color, Mars is visible high overhead after dark all month. At the start of the month it lies along a line with bright stars Procyon and Pollux, but you’ll notice it moves noticeably over the course of April (~12 degrees or the width of your outstretched fist at arm’s length).
Transcript
What’s Up for April? Planets at dusk and dawn, April showers, and observing a distant city of stars.
Sky chart showing Jupiter and the crescent Moon on April 1. A similar scene repeats on April 30, but with the Moon appearing above Jupiter. NASA/JPL-Caltech First up, in the evening sky, we begin and end the month with Jupiter and the crescent Moon shining brightly together in the western sky as sunset fades. On both April 1st and 30th, you can find the charming pair about half an hour after sunset, setting about 3 hours later.
Mars is high overhead in the south on April evenings. At the start of the month, it’s directly in between bright stars Procyon and Pollux, but it moves noticeably during the month. You’ll find the first-quarter moon right next to Mars on April 4th and 5th.
Moving to the morning sky, Venus has now made the switch from an evening object to a morning one. You may start to notice it rising low in the east before dawn, looking a little higher each morning through the month.
Sky chart showing the eastern sky 45 minutes before sunrise on April 24, with Venus, Saturn and the crescent Moon forming a grouping low in the sky. Mercury might also be visible for those with a completely clear view to the horizon. NASA/JPL-Caltech Around April 24th and 25th, you’ll find Venus, Saturn, and the crescent moon gathered low in the east as dawn warms up the morning sky. Those with a clear view to the horizon might also pick out Mercury looking bright, but very low in the sky.
April brings shooting stars as Earth passes through one the streams of comet dust that create our annual meteor showers. The Lyrids are a modest meteor shower that peaks overnight on April 21st and into the morning of the 22nd. You can expect up to 15 meteors per hour near the peak under dark skies.
The Lyrids are best observed from the Northern Hemisphere, but can be seen from south of the equator as well. View them after about 10:30pm local time until dawn, with the best viewing around 5 a.m. The waning crescent moon will rise around 3:30am, but at only 27% full, it shouldn’t interfere too much with your meteor watching. For the best experience, face roughly toward the east, lie down in a safe, dark place away from bright lights, and look straight overhead. Meteors can appear anywhere in the sky, and some Lyrids can leave bright trails that last for a few seconds after they’ve passed.
NASA studies meteors from the ground, in the air, and from orbit to forecast meteor activity and protect spacecraft, and to understand the composition of comets and asteroids throughout our solar system.
Sky chart facing east around 9pm in April 2025 showing the location of globular cluster M3. The chart depicts the cluster’s position relative to the Big Dipper and bright stars Arcturus and Cor Caroli. The Big Dipper star Megrez serves as an indicator for the brightness of Cor Caroli. For easy visibility, M3 is depicted brighter and larger than its actual appearance. NASA/JPL-Caltech April offers a chance to observe a truly distant wonder – a globular cluster known as “M3.” It’s a vast collection of stars that lies 34,000 light-years from Earth in our galaxy’s outer reaches. Astronomer Charles Messier discovered this object in 1764, while searching for new comets. Realizing it wasn’t one, he added it to his list of interesting objects that were not comets, which today we know as Messier’s catalog.
Through binoculars, Messier 3, or M3, appears as a small, fuzzy, star-like patch of light. With a small telescope, you’ll see a more defined glow with a slightly grainy texture. And with telescopes 8 inches or larger, the cluster begins to resolve into hundreds of individual stars.
Now, globular clusters contain some of the oldest stars in the universe, often over 10 billion years old. Unlike open clusters like the Pleiades, which sit within the Milky Way’s spiral arms, globular clusters are found in the galaxy’s halo, orbiting far above and below the Milky Way’s disk. Our galaxy has around 150 confirmed globular clusters. M3 itself is probably 11 to 13 billion years old and contains around half a million stars. And it’s relatively easy to spot in April under dark skies with binoculars or a small telescope.
Finding M3 starts with the Big Dipper. Facing east, use the Dipper’s handle to “arc to Arcturus,” the fourth-brightest star in the night sky. From there, look higher in the sky to find the star Cor Caroli located here to the west of the Dipper’s handle. It’s about as bright as this star in the Dipper’s cup. M3 is located roughly a third of the way from Arcturus to Cor Caroli. With binoculars or a finder scope, sweep within this area until you spot a faint, round glow.
M3 is an excellent target for beginners and seasoned observers alike. Whether using binoculars or a telescope, you’ll be rewarded with a view of one of the oldest objects in our galaxy.
The phases of the Moon for April 2025. NASA/JPL-Caltech Above are the phases of the Moon for April.
Stay up to date on all of NASA’s missions exploring the solar system and beyond at NASA Science. I’m Preston Dyches from NASA’s Jet Propulsion Laboratory, and that’s What’s Up for this month.
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