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NASA Administrator Bill Nelson, left, and U.S. Department of State Acting Assistant Secretary in the Bureau of Oceans and International Environmental and Scientific Affairs Jennifer R. Littlejohn, right, look on as Ambassador of the Republic of Austria to the United States of America Petra Schneebauer, signs the Artemis Accords, Wednesday, Dec. 11, 2024, at the Mary W. Jackson NASA Headquarters building in Washington. The Republic of Austria is the 50th country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Credit: NASA/Joel Kowsky
Lee esta nota de prensa en español aquí.
Panama and Austria signed the Artemis Accords Wednesday during separate signing ceremonies at NASA Headquarters in Washington, becoming the 49th and 50th nations to commit to the responsible exploration of space for all humanity.
“NASA welcomes Panama and Austria to the Artemis Accords community and celebrates 50 countries united by shared principles for the safe and responsible exploration of space,” NASA Administrator Bill Nelson said. “More than ever before, NASA is opening space to more nations and more people for the benefit of all. Together we are building long-term and peaceful deep space exploration for the Artemis Generation.”
In just a few years, the original group of eight country signatories including the United States has multiplied, with 17 countries signings in 2024. More than a number, the Artemis Accords represent a robust community, from every region of the world, unified by the same goal: to ensure safe and responsible civil space exploration.
Through the Artemis Accords, the United States and other signatories are progressing toward continued safe and sustainable exploration of space with concrete outcomes. They committed to a method of operation and set of recommendations on non-interference, interoperability, release of scientific data, long-term sustainability guidelines, and registration to advance the implementation of the Artemis Accords.
Potential focus areas for the next year include further advancing sustainability, including debris management for both lunar orbit and the surface of the Moon.
Austria Joins Artemis Accords
Petra Schneebauer, ambassador of the Republic of Austria to the United States, signed the accords on behalf of Austria, becoming the 50th country signatory.
“Austria is proud to sign the Artemis Accords, an important step in fostering international cooperation for the civil exploration of the Moon and expanding humanity’s presence in the cosmos,” said Schneebauer. “By signing the Accords, we reaffirm our commitment to the peaceful, responsible, and cooperative use of space while emphasizing our support for strong multilateral partnerships and scientific progress. This cooperation will open new prospects for Austrian businesses, scientists, and research institutions to engage in pioneering space initiatives.”
Jennifer Littlejohn, acting assistant secretary, Bureau of Oceans and International Environmental and Scientific Affairs, U.S. Department of State, also participated in Austria’s signing event.
Panama Joins Artemis Accords
Earlier Wednesday, Nelson hosted Panama for a signing ceremony. José Miguel Alemán Healy, ambassador of the Republic of Panama to the United States, signed the Artemis Accords on behalf of Panama. Principal Deputy Assistant Secretary Tony Fernandes for U.S. Department of State’s Bureau of Oceans and International Environmental and Scientific Affairs also participated in the event.
NASA Administrator Bill Nelson, left, Ambassador of the Republic of Panama to the United States of America José Miguel Alemán Healy, center, and U.S. Department of State Principal Deputy Assistant Secretary in the Bureau of Oceans and International Environmental and Scientific Affairs Tony Fernandes, pose for a picture after the Republic of Panama signed the Artemis Accords, Wednesday, Dec. 11, 2024, at the Mary W. Jackson NASA Headquarters building in Washington. The Republic of Panama is the 49th country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Credit: NASA/Joel Kowsky “Today, Panama takes its place among many other nations looking not just to our own horizons, but to the horizons beyond our planet – exploring, learning, and contributing to humanity’s collective knowledge,” said Alemán.”This moment represents far more than a diplomatic signature. It is a bold commitment to peaceful exploration, scientific discovery, and international collaboration.”
In 2020, the United States, led by NASA with the U.S. Department of State, and seven other initial signatory nations established the Artemis Accords, identifying a set of principles promoting the beneficial use of space for humanity.
The Artemis Accords are grounded in the Outer Space Treaty and other agreements including the Registration Convention, the Rescue and Return Agreement, as well as best practices and norms of responsible behavior that NASA and its partners have supported, including the public release of scientific data.
The accords are a voluntary commitment to engage in safe, transparent, responsible behavior in space, and any nation that wants to commit to those values is welcome to sign.
Learn more about the Artemis Accords at:
https://www.nasa.gov/artemis-accords
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Meira Bernstein / Elizabeth Shaw
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By NASA
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Preparations for Next Moonwalk Simulations Underway (and Underwater)
Watersheds on the U.S. Eastern Seaboard will be among the areas most affected by underground saltwater intrusion by the year 2100 due to sea level rise and changes in groundwater supplies, according to a NASA-DOD study. NASA’s Terra satellite captured this image on April 21, 2023. Intrusion of saltwater into coastal groundwater can make water there unusable, damage ecosystems, and corrode infrastructure.
Seawater will infiltrate underground freshwater supplies in about three of every four coastal areas around the world by the year 2100, according to a recent study led by researchers at NASA’s Jet Propulsion Laboratory in Southern California. In addition to making water in some coastal aquifers undrinkable and unusable for irrigation, these changes can harm ecosystems and corrode infrastructure.
Called saltwater intrusion, the phenomenon happens below coastlines, where two masses of water naturally hold each other at bay. Rainfall on land replenishes, or recharges, fresh water in coastal aquifers (underground rock and soil that hold water), which tends to flow below ground toward the ocean. Meanwhile, seawater, backed by the pressure of the ocean, tends to push inland. Although there’s some mixing in the transition zone where the two meet, the balance of opposing forces typically keeps the water fresh on one side and salty on the other.
Now, two impacts of climate change are tipping the scales in favor of salt water. Spurred by planetary warming, sea level rise is causing coastlines to migrate inland and increasing the force pushing salt water landward. At the same time, slower groundwater recharge — due to less rainfall and warmer weather patterns — is weakening the force moving the underground fresh water in some areas.
Worldwide Intrusion
Saltwater intrusion will affect groundwater in about three of every four coastal aquifers around the world by the year 2100, a NASA-DOD study estimates. Saltwater can make groundwater in coastal areas undrinkable and useless for irrigation, as well as harm ecosystems and corrode infrastructure.NASA/JPL-Caltech The study, published in Geophysical Research Letters in November, evaluated more than 60,000 coastal watersheds (land area that channels and drains all the rainfall and snowmelt from a region into a common outlet) around the world, mapping how diminished groundwater recharge and sea level rise will each contribute to saltwater intrusion while estimating what their net effect will be.
Considering the two factors separately, the study’s authors found that by 2100 rising sea levels alone will tend to drive saltwater inland in 82% of coastal watersheds studied. The transition zone in those places would move a relatively modest distance: no more than 656 feet (200 meters) from current positions. Vulnerable areas include low-lying regions such as Southeast Asia, the coast around the Gulf of Mexico, and much of the United States’ Eastern Seaboard.
Meanwhile, slower recharge on its own will tend to cause saltwater intrusion in 45% of the coastal watersheds studied. In these areas, the transition zone would move farther inland than it will from sea level rise — as much as three-quarters of a mile (about 1,200 meters) in some places. The regions to be most affected include the Arabian Peninsula, Western Australia, and Mexico’s Baja California peninsula. In about 42% of coastal watersheds, groundwater recharge will increase, tending to push the transition zone toward the ocean and in some areas overcoming the effect of saltwater intrusion by sea level rise.
All told, due to the combined effects of changes in sea level and groundwater recharge, saltwater intrusion will occur by century’s end in 77% of the coastal watersheds evaluated, according to the study.
Generally, lower rates of groundwater recharge are going to drive how far saltwater intrudes inland, while sea level rise will determine how widespread it is around the world. “Depending on where you are and which one dominates, your management implications might change,” said Kyra Adams, a groundwater scientist at JPL and the paper’s lead author.
For example, if low recharge is the main reason intrusion is happening in one area, officials there might address it by protecting groundwater resources, she said. On the other hand, if the greater concern is that sea level rise will oversaturate an aquifer, officials might divert groundwater.
Global Consistency
Co-funded by NASA and the U.S. Department of Defense (DOD), the study is part of an effort to evaluate how sea level rise will affect the department’s coastal facilities and other infrastructure. It used information on watersheds collected in HydroSHEDS, a database managed by the World Wildlife Fund that uses elevation observations from the NASA Shuttle Radar Topography Mission. To estimate saltwater intrusion distances by 2100, the researchers used a model accounting for groundwater recharge, water table rise, fresh- and saltwater densities, and coastal migration from sea level rise, among other variables.
Study coauthor Ben Hamlington, a climate scientist at JPL and a coleader of NASA’s Sea Level Change Team, said that the global picture is analogous to what researchers see with coastal flooding: “As sea levels rise, there’s an increased risk of flooding everywhere. With saltwater intrusion, we’re seeing that sea level rise is raising the baseline risk for changes in groundwater recharge to become a serious factor.”
A globally consistent framework that captures localized climate impacts is crucial for countries that don’t have the expertise to generate one on their own, he added.
“Those that have the fewest resources are the ones most affected by sea level rise and climate change,” Hamlington said, “so this kind of approach can go a long way.”
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Andrew Wang / Jane J. Lee
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Last Updated Dec 11, 2024 Related Terms
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NASA Study: Crops, Forests Responding to Changing Rainfall Patterns
Earth’s rainy days are changing and plant life is responding. This visualization shows average precipitation for the entire globe based on more than 20 years of data from 2000 to 2023. Cooler colors indicate areas that receive less rain. Warm colors receive more rain. NASA’s Scientific Visualization Studio A new NASA-led study has found that how rain falls in a given year is nearly as important to the world’s vegetation as how much. Reporting Dec. 11 in Nature, the researchers showed that even in years with similar rainfall totals, plants fared differently when that water came in fewer, bigger bursts.
In years with less frequent but more concentrated rainfall, plants in drier environments like the U.S. Southwest were more likely to thrive. In humid ecosystems like the Central American rainforest, vegetation tended to fare worse, possibly because it could not tolerate the longer dry spells.
Scientists have previously estimated that almost half of the world’s vegetation is driven primarily by how much rain falls in a year. Less well understood is the role of day-to-day variability, said lead author Andrew Feldman, a hydrologist and ecosystem scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. Shifting precipitation patterns are producing stronger rainstorms — with longer dry spells in between — compared to a century ago.
“You can think of it like this: if you have a house plant, what happens if you give it a full pitcher of water on Sunday versus a third of a pitcher on Monday, Wednesday, and Friday?” said Feldman. Scale that to the size of the U.S. Corn Belt or a rainforest and the answer could have implications for crop yields and ultimately how much carbon dioxide plants remove from the atmosphere.
Blooms in Desert
The team, including researchers from the U.S. Department of Agriculture and multiple universities, analyzed two decades of field and satellite observations, spanning millions of square miles. Their study area encompassed diverse landscapes from Siberia to the southern tip of Patagonia.
Yellow wildflowers and orange poppies carpet the desert following a wet winter for the Antelope Valley in California. NASA/Jim Ross They found that plants across 42% of Earth’s vegetated land surface were sensitive to daily rainfall variability. Of those, a little over half fared better — often showing increased growth — in years with fewer but more intense wet days. These include croplands as well as drier landscapes like grasslands and deserts.
In contrast, broadleaf (e.g., oak, maple, and beech) forests and rainforests in lower and middle latitudes tended to fare worse under those conditions. The effect was especially pronounced in Indo-Pacific rainforests, including in the Philippines and Indonesia.
Statistically, daily rainfall variability was nearly as important as annual rainfall totals in driving growth worldwide.
Red Light, Green Light
The new study relied primarily on a suite of NASA missions and datasets, including the Integrated Multi-satellitE Retrievals for GPM (IMERG) algorithm, which provides rain and snowfall rates for most of the planet every 30 minutes using a network of international satellites.
To gauge plant response day to day, the researchers calculated how green an area appeared in satellite imagery. “Greenness”, also known asthe Normalized Difference Vegetation Index, is commonly used to estimate vegetation density and health. They also tracked a faint reddish light that plants emit during photosynthesis, when a plant absorbs sunlight to convert carbon dioxide and water into food, its chlorophyll “leaks” unused photons. This faint light is called solar-induced fluorescence, and it’s a telltale sign of flourishing vegetation.
Growing plants emit a form of light detectable by NASA satellites orbiting hundreds of miles above Earth. Parts of North America appear to glimmer in this visualization, depicting an average year. Gray indicates regions with little or no fluorescence; red, pink, and white indicate high fluorescence. NASA Scientific Visualization Studio Not visible bythe naked eye, plant fluorescence can be detected by instruments aboard satellites such as NASA’s Orbiting Carbon Observatory-2 (OCO-2). Launched in 2014, OCO-2 has observed the U.S. Midwest fluorescing strongly during the growing season.
Feldman said the findings highlight the vital role that plants play in moving carbon around Earth — a process called the carbon cycle. Vegetation, including crops, forests, and grasslands, forms a vast carbon “sink,” absorbing excess carbon dioxide from the atmosphere.
“A finer understanding of how plants thrive or decline day to day, storm by storm, could help us better understand their role in that critical cycle,” Feldman said.
The study also included researchers from NASA’s Jet Propulsion Laboratory in Southern California, Stanford University, Columbia University, Indiana University, and the University of Arizona.
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Webb Webb News Latest News Latest Images Blog (offsite) Awards X (offsite – login reqd) Instagram (offsite – login reqd) Facebook (offsite- login reqd) Youtube (offsite) Overview About Who is James Webb? Fact Sheet Impacts+Benefits FAQ Science Overview and Goals Early Universe Galaxies Over Time Star Lifecycle Other Worlds Observatory Overview Launch Orbit Mirrors Sunshield Instrument: NIRCam Instrument: MIRI Instrument: NIRSpec Instrument: FGS/NIRISS Optical Telescope Element Backplane Spacecraft Bus Instrument Module Multimedia About Webb Images Images Videos What is Webb Observing? 3d Webb in 3d Solar System Podcasts Webb Image Sonifications Team International Team People Of Webb More For the Media For Scientists For Educators For Fun/Learning 6 Min Read Found: First Actively Forming Galaxy as Lightweight as Young Milky Way
Hundreds of overlapping objects at various distances are spread across this field. At the very center is a tiny galaxy nicknamed Firefly Sparkle that looks like a long, angled, dotted line. Smaller companions are nearby. Credits:
NASA, ESA, CSA, STScI, Chris Willott (National Research Council Canada), Lamiya Mowla (Wellesley College), Kartheik Iyer (Columbia University) For the first time, NASA’s James Webb Space Telescope has detected and “weighed” a galaxy that not only existed around 600 million years after the big bang, but is also similar to what our Milky Way galaxy’s mass might have been at the same stage of development. Other galaxies Webb has detected at this time period are significantly more massive. Nicknamed the Firefly Sparkle, this galaxy is gleaming with star clusters — 10 in all — each of which researchers examined in great detail.
Image A: Firefly Sparkle Galaxy and Companions in Galaxy Cluster MACS J1423 (NIRCam Image)
For the first time, astronomers using NASA’s James Webb Space Telescope have identified a galaxy, nicknamed the Firefly Sparkle, that not only is in the process of assembling and forming stars around 600 million years after the big bang, but also weighs about the same as our Milky Way galaxy if we could “wind back the clock” to weigh it as it developed. Two companion galaxies are close by, which may ultimately affect how this galaxy forms and builds mass over billions of years. NASA, ESA, CSA, STScI, Chris Willott (National Research Council Canada), Lamiya Mowla (Wellesley College), Kartheik Iyer (Columbia University) “I didn’t think it would be possible to resolve a galaxy that existed so early in the universe into so many distinct components, let alone find that its mass is similar to our own galaxy’s when it was in the process of forming,” said Lamiya Mowla, co-lead author of the paper and an assistant professor at Wellesley College in Massachusetts. “There is so much going on inside this tiny galaxy, including so many different phases of star formation.”
Webb was able to image the galaxy in crisp detail for two reasons. One is a benefit of the cosmos: A massive foreground galaxy cluster radically enhanced the distant galaxy’s appearance through a natural effect known as gravitational lensing. And when combined with the telescope’s specialization in high-resolution infrared light, Webb delivered unprecedented new data about the galaxy’s contents.
Image B: Galaxy Cluster MACS J1423 (NIRCam Image)
In this image from NASA’s James Webb Space Telescope, thousands of glimmering galaxies are bound together by their own gravity, making up a massive cluster formally classified as MACS J1423. The largest, bright white oval is a supergiant elliptical galaxy. The galaxy cluster acts like a lens, magnifying and distorting the light of objects that lie well behind it, an effect known as gravitational lensing. NASA, ESA, CSA, STScI, Chris Willott (National Research Council Canada), Lamiya Mowla (Wellesley College), Kartheik Iyer (Columbia University) “Without the benefit of this gravitational lens, we would not be able to resolve this galaxy,” said Kartheik Iyer, co-lead author and NASA Hubble Fellow at Columbia University in New York. “We knew to expect it based on current physics, but it’s surprising that we actually saw it.”
Mowla, who spotted the galaxy in Webb’s image, was drawn to its gleaming star clusters, because objects that sparkle typically indicate they are extremely clumpy and complicated. Since the galaxy looks like a “sparkle” or swarm of lightning bugs on a warm summer night, they named it the Firefly Sparkle galaxy.
Reconstructing the Galaxy’s Appearance
The research team modeled what the galaxy might have looked like if it weren’t stretched and discovered that it resembled an elongated raindrop. Suspended within it are two star clusters toward the top and eight toward the bottom. “Our reconstruction shows that clumps of actively forming stars are surrounded by diffuse light from other unresolved stars,” said Iyer. “This galaxy is literally in the process of assembling.”
Webb’s data shows the Firefly Sparkle galaxy is on the smaller side, falling into the category of a low-mass galaxy. Billions of years will pass before it builds its full heft and a distinct shape. “Most of the other galaxies Webb has shown us aren’t magnified or stretched, and we are not able to see their ‘building blocks’ separately. With Firefly Sparkle, we are witnessing a galaxy being assembled brick by brick,” Mowla said.
Stretched Out and Shining, Ready for Close Analysis
Since the galaxy is warped into a long arc, the researchers easily picked out 10 distinct star clusters, which are emitting the bulk of the galaxy’s light. They are represented here in shades of pink, purple, and blue. Those colors in Webb’s images and its supporting spectra confirmed that star formation didn’t happen all at once in this galaxy, but was staggered in time.
“This galaxy has a diverse population of star clusters, and it is remarkable that we can see them separately at such an early age of the universe,” said Chris Willott from the National Research Council of Canada’s Herzberg Astronomy and Astrophysics Research Centre, a co-author and the observation program’s principal investigator. “Each clump of stars is undergoing a different phase of formation or evolution.”
The galaxy’s projected shape shows that its stars haven’t settled into a central bulge or a thin, flattened disk, another piece of evidence that the galaxy is still forming.
Image C: Illustration of the Firefly Sparkle Galaxy in the Early Universe (Artist’s Concept)
This artist concept depicts a reconstruction of what the Firefly Sparkle galaxy looked like about 600 million years after the big bang if it wasn’t stretched and distorted by a natural effect known as gravitational lensing. This illustration is based on images and data from NASA’s James Webb Space Telescope. Illustration: NASA, ESA, CSA, Ralf Crawford (STScI). Science: Lamiya Mowla (Wellesley College), Guillaume Desprez (Saint Mary’s University) Video: “Firefly Sparkle” Reveals Early Galaxy
‘Glowing’ Companions
Researchers can’t predict how this disorganized galaxy will build up and take shape over billions of years, but there are two galaxies that the team confirmed are “hanging out” within a tight perimeter and may influence how it builds mass over billions of years.
Firefly Sparkle is only 6,500 light-years away from its first companion, and its second companion is separated by 42,000 light-years. For context, the fully formed Milky Way is about 100,000 light-years across — all three would fit inside it. Not only are its companions very close, the researchers also think that they are orbiting one another.
Each time one galaxy passes another, gas condenses and cools, allowing new stars to form in clumps, adding to the galaxies’ masses. “It has long been predicted that galaxies in the early universe form through successive interactions and mergers with other tinier galaxies,” said Yoshihisa Asada, a co-author and doctoral student at Kyoto University in Japan. “We might be witnessing this process in action.”
The team’s research relied on data from Webb’s CAnadian NIRISS Unbiased Cluster Survey (CANUCS), which includes near-infrared images from NIRCam (Near-Infrared Camera) and spectra from the microshutter array aboard NIRSpec (Near-Infrared Spectrograph). The CANUCS data intentionally covered a field that NASA’s Hubble Space Telescope imaged as part of its Cluster Lensing And Supernova survey with Hubble (CLASH) program.
This work has been published on December 11, 2024 in the journal Nature.
The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).
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By NASA
As part of NASA’s CLPS (Commercial Lunar Payload Services) initiative and Artemis campaign, Firefly Aerospace’s Blue Ghost Mission One lander will carry 10 NASA science and technology instruments to the Moon’s near side.
Credit: Firefly Aerospace
NASA will host a media teleconference at 1 p.m. EST Tuesday, Dec. 17, to discuss the agency science and technology flying aboard Firefly Aerospace’s first delivery to the Moon as part of the NASA’s CLPS (Commercial Lunar Payload Services) initiative and Artemis campaign.
Audio of the call will livestream on the agency’s website at:
https://www.nasa.gov/live
Briefing participants include:
Joel Kearns, deputy associate administrator for exploration, Science Mission Directorate, NASA Headquarters Ryan Watkins, program scientist, Exploration Science Strategy and Integration Office, NASA Headquarters Jason Kim, chief executive officer, Firefly Aerospace
To participate by telephone, media must RSVP no later than two hours before the briefing to: ksc-newsroom@mail.nasa.gov.
Firefly’s Blue Ghost lunar lander will launch on a SpaceX Falcon 9 rocket from Launch Complex 39A at NASA’s Kennedy Space Center in Florida. The six-day launch window opens no earlier than mid-January 2025.
The lunar mission, named Ghost Riders in the Sky, will land near a volcanic feature called Mons Latreille within Mare Crisium, a more than 300-mile-wide basin located in the northeast quadrant of the Moon’s near side. The mission will carry 10 NASA instruments and first-of-their-kind demonstrations to further our understanding of the Moon’s environment and help prepare for future human missions to the lunar surface, as part of the agency’s Moon to Mars exploration approach.
Science investigations on this flight include testing lunar subsurface drilling, regolith sample collection, global navigation satellite system abilities, radiation tolerant computing, and lunar dust mitigation. The data captured could also benefit humans on Earth by providing insights into how space weather and other cosmic forces impact Earth.
Under the CLPS model, NASA is investing in commercial delivery services to the Moon to enable industry growth and support long-term lunar exploration. As a primary customer for CLPS deliveries, NASA is to be one of many customers on future flights.
For updates, follow on:
https://blogs.nasa.gov/artemis/
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