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By NASA
Credit: NASA Jared Isaacman is set to participate in a hearing to become the next NASA administrator at 10 a.m. EDT on Wednesday, April 9, before the U.S. Senate Committee on Commerce, Science, and Transportation. The nomination hearing will take place at Russell Senate Office Building in Washington.
The agency will stream the hearing on NASA+, and the committee will stream it on its website and YouTube channel. Learn how to watch NASA content on a variety of agency platforms, including social media.
President Trump formally nominated Isaacman for NASA administrator on Jan. 20. The following is a statement from acting NASA Administrator Janet Petro on the nomination hearing:
“I’m glad the Senate has scheduled a hearing to consider Jared Isaacman’s nomination as NASA administrator. Isaacman’s experience in commercial spaceflight and his commitment to advancing space capabilities align with NASA’s ongoing efforts to enhance America’s position as the global leader in space exploration. Upon confirmation, his leadership will support our work to drive American innovation, strengthen partnerships, and further the essential mission of the agency for the benefit of all.”
Media interested in participating in the event must contact Bethany Stevens and their respective Senate media gallery to RSVP. Contact details are available on the committee’s website.
For more information about NASA missions, visit:
https://www.nasa.gov
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Bethany Stevens / Cheryl Warner
Headquarters, Washington
202-358-1600
bethany.c.stevens@nasa.gov / cheryl.m.warner@nasa.gov
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Last Updated Apr 07, 2025 EditorJessica TaveauLocationNASA Headquarters Related Terms
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By NASA
After months of groundbreaking research, exploration, and teamwork aboard the International Space Station, NASA’s SpaceX Crew-9 has returned to Earth.
NASA astronauts Nick Hague, Suni Williams, and Butch Wilmore, as well as Roscosmos cosmonaut Aleksandr Gorbunov, splashed down safely on March 18, 2025, as a pod of dolphins circled the Dragon spacecraft near Tallahassee, Florida.
NASA astronauts Nick Hague, Suni Williams, Butch Wilmore, and Roscosmos cosmonaut Aleksandr Gorbunov aboard the SpaceX Dragon spacecraft in the water off the coast of Tallahassee, Florida, March 18, 2025.NASA/Keegan Barber Williams and Wilmore made history as the first humans to fly aboard Boeing’s Starliner spacecraft during NASA’s Boeing Crew Flight Test (CFT). Launched June 5, 2024, aboard a United Launch Alliance Atlas V rocket from Cape Canaveral Space Force Station, the CFT mission was Boeing’s first crewed flight.
Hague and Gorbunov launched to the space station on Sept. 28, 2024, aboard a SpaceX Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida.
NASA’s SpaceX Crew-9 members pose together for a portrait inside the International Space Station’s Unity module. From left, are NASA astronaut Suni Williams, Roscosmos cosmonaut Aleksandr Gorbunov, and NASA astronauts Nick Hague and Butch Wilmore.NASA During their long-duration mission, the American crew members conducted more than 150 unique experiments and logged over 900 hours of research aboard the orbiting laboratory.
Their work included studying plant growth and development, testing stem cell technology for patient care on Earth, and examining how spaceflight affects materials—insights vital for future deep space missions.
The crew kicked off 2025 with two spacewalks that included removing an antenna assembly from the station’s truss, collecting microbial samples from the orbital outpost’s exterior for analysis by Johnson’s Astromaterials Research and Exploration Science division, installing patches to cover damaged areas of light filters on an X-ray telescope, and more.
Williams now holds the record for the most cumulative spacewalking time by a woman — 62 hours and 6 minutes — placing her fourth among the most experienced spacewalkers in history.
While in orbit, the crew also engaged the next generation through 30 ham radio events with students around the world and supported a student-led genetic experiment.
As part of the CFT, Williams and Wilmore commanded Starliner during in-flight testing and were the first to see the spacecraft integrated in simulations and operate it hands-on in space, evaluating systems like maneuvering, docking, and emergency protocols.
“We’ve learned a lot about systems integrated testing that will pay benefits going forward and lay the groundwork for future missions,” said Wilmore.
Suni Williams and Butch Wilmore participate in an emergency operations simulation in the Boeing Starliner simulator at Johnson Space Center in Houston.NASA/Robert Markowitz Following the test flight, NASA and Boeing are continuing work toward crew certification of the company’s CST-100 Starliner system. Joint teams are addressing in-flight anomalies and preparing for propulsion system testing ahead of the next mission.
Despite the unexpected challenges, including technical issues with the Starliner spacecraft that extended their mission, both Wilmore and Williams said they would do it all over again. Wilmore emphasized his gratitude in being part of testing Starliner’s capabilities, stating, “I’d get on it in a heartbeat.”
After returning to Earth, the crew received a warm welcome from family, colleagues, and fellow astronauts at Johnson Space Center’s Ellington Field. They were greeted by Johnson Acting Director Steve Koerner, who applauded their dedication and resilience.
Suni Williams is greeted by Johnson Acting Director Steve Koerner at Ellington Field in Houston after completing a long-duration science mission aboard the International Space Station.NASA/Robert Markowitz Williams shared a heartfelt embrace with astronaut Zena Cardman, thanking her for “taking one for the team.” Cardman had originally been assigned to Crew-9, but in August, NASA announced the uncrewed return of Starliner to Earth and integrated Wilmore and Williams into Expedition 71/72 for a return on Crew-9. This adjustment meant Cardman and astronaut Stephanie Wilson would no longer fly the mission—a decision that underscored the flexibility and teamwork essential to human spaceflight.
Cardman is now assigned as commander of NASA’s SpaceX Crew-11 mission, set to launch in the coming months to the International Space Station for a long-duration science expedition.
Butch Wilmore receives a warm welcome from NASA astronauts Reid Wiseman and Woody Hoburg at Ellington Field.NASA/Robert Markowitz Williams and Wilmore each brought decades of experience to the mission. Wilmore, a retired U.S. Navy captain and veteran fighter pilot, has logged 464 days in space over three flights. Outside of NASA, he serves as a pastor, leads Bible studies, and participates in mission trips across Central and South America. A skilled craftsman, he also builds furniture and other pieces for his local church.
Growing up in Tennessee, Wilmore says his faith continues to guide him, especially when navigating the uncertainties of flight.
Expedition 72 Flight Engineer Butch Wilmore works inside the International Space Station’s Columbus laboratory module to install the European Enhanced Exploration Exercise Device.NASA Wilmore encourages the next generation with a call to action: “Strap on your work hat and let’s go at it!” He emphasizes that tenacity and perseverance are essential for achieving anything of value. Motivated by a sense of patriotic duty and a desire to help those in need, Wilmore sees his astronaut role as a commitment to both his country and humanity at large.
Wilmore believes he’s challenged every day at NASA. “Doing the right things for the right reasons is what motivates me,” he said.
Expedition 72 Commander Suni Williams monitors an Astrobee robotic free-flyer outfitted with tentacle-like arms containing gecko-like adhesive pads preparing to grapple a “capture cube.”NASA A retired U.S. Navy captain and veteran of three spaceflights, Williams is a helicopter pilot, basic diving officer, and the first person to run the Boston Marathon in space—once in 2007, and again aboard the station in 2025. Originally from Needham, Massachusetts, she brings a lifelong spirit of adventure and service to everything she does.
“There are no limits,” said Williams. “Your imagination can make something happen, but it’s not always easy. There are so many cool things we can invent to solve problems—and that’s one of the joys of working in the space program. It makes you ask questions.”
Hague, a Kansas native, has logged a total of 374 days in space across three missions. A U.S. Space Force colonel and test pilot, he’s served in roles across the country and abroad, including a deployment to Iraq.
“When we’re up there operating in space, it’s focused strictly on mission,” said Hague. “We are part of an international team that spans the globe and works with half a dozen mission control centers that are talking in multiple languages — and we figure out how to make it happen. That’s the magic of human spaceflight: it brings people together.”
Expedition 72 Pilot Nick Hague inside the cupola with space botany hardware that supports the Rhodium Plant LIFE investigation.NASA For Williams, Wilmore, Hague, Gorbunov, and the team supporting them, Crew-9 marks the beginning of a new era of space exploration — one driven by innovation, perseverance, and the unyielding dream of reaching beyond the stars.
Watch the full press conference following the crew’s return to Earth here.
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By European Space Agency
For decades, satellites have played a crucial role in our understanding of the remote polar regions. The ongoing loss of Antarctic ice, owing to the climate crisis, is, sadly, no longer surprising. However, satellites do more than just track the accelerating flow of glaciers towards the ocean and measure ice thickness.
New research highlights how ESA’s CryoSat mission has been used to uncover the hidden impact of subglacial lakes – vast reservoirs of water buried deep under the ice – that can suddenly drain into the ocean in dramatic outbursts and affect ice loss.
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By NASA
Explore This Section 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 Deployment 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 5 Min Read NASA Webb Explores Effect of Strong Magnetic Fields on Star Formation
An image of the Milky Way captured by the MeerKAT radio telescope array puts the James Webb Space Telescope’s image of the Sagittarius C region in context. Full image below. Credits:
NASA, ESA, CSA, STScI, SARAO, Samuel Crowe (UVA), John Bally (CU), Ruben Fedriani (IAA-CSIC), Ian Heywood (Oxford) Follow-up research on a 2023 image of the Sagittarius C stellar nursery in the heart of our Milky Way galaxy, captured by NASA’s James Webb Space Telescope, has revealed ejections from still-forming protostars and insights into the impact of strong magnetic fields on interstellar gas and the life cycle of stars.
“A big question in the Central Molecular Zone of our galaxy has been, if there is so much dense gas and cosmic dust here, and we know that stars form in such clouds, why are so few stars born here?” said astrophysicist John Bally of the University of Colorado Boulder, one of the principal investigators. “Now, for the first time, we are seeing directly that strong magnetic fields may play an important role in suppressing star formation, even at small scales.”
Detailed study of stars in this crowded, dusty region has been limited, but Webb’s advanced near-infrared instruments have allowed astronomers to see through the clouds to study young stars like never before.
“The extreme environment of the galactic center is a fascinating place to put star formation theories to the test, and the infrared capabilities of NASA’s James Webb Space Telescope provide the opportunity to build on past important observations from ground-based telescopes like ALMA and MeerKAT,” said Samuel Crowe, another principal investigator on the research, a senior undergraduate at the University of Virginia and a 2025 Rhodes Scholar.
Bally and Crowe each led a paper published in The Astrophysical Journal.
Image A: Milky Way Center (MeerKAT and Webb)
An image of the Milky Way captured by the MeerKAT (formerly the Karoo Array Telescope) radio telescope array puts the James Webb Space Telescope’s image of the Sagittarius C region in context. Like a super-long exposure photograph, MeerKAT shows the bubble-like remnants of supernovas that exploded over millennia, capturing the dynamic nature of the Milky Way’s chaotic core. At the center of the MeerKAT image the region surrounding the Milky Way’s supermassive black hole blazes bright. Huge vertical filamentary structures echo those captured on a smaller scale by Webb in Sagittarius C’s blue-green hydrogen cloud. NASA, ESA, CSA, STScI, SARAO, Samuel Crowe (UVA), John Bally (CU), Ruben Fedriani (IAA-CSIC), Ian Heywood (Oxford) Image B: Milky Way Center (MeerKAT and Webb), Labeled
The star-forming region Sagittarius C, captured by the James Webb Space Telescope, is about 200 light-years from the Milky Way’s central supermassive black hole, Sagittarius A*. The spectral index at the lower left shows how color was assigned to the radio data to create the image. On the negative end, there is non-thermal emission, stimulated by electrons spiraling around magnetic field lines. On the positive side, thermal emission is coming from hot, ionized plasma. For Webb, color is assigned by shifting the infrared spectrum to visible light colors. The shortest infrared wavelengths are bluer, and the longer wavelengths appear more red. NASA, ESA, CSA, STScI, SARAO, Samuel Crowe (UVA), John Bally (CU), Ruben Fedriani (IAA-CSIC), Ian Heywood (Oxford) Using Infrared to Reveal Forming Stars
In Sagittarius C’s brightest cluster, the researchers confirmed the tentative finding from the Atacama Large Millimeter Array (ALMA) that two massive stars are forming there. Along with infrared data from NASA’s retired Spitzer Space Telescope and SOFIA (Stratospheric Observatory for Infrared Astronomy) mission, as well as the Herschel Space Observatory, they used Webb to determine that each of the massive protostars is already more than 20 times the mass of the Sun. Webb also revealed the bright outflows powered by each protostar.
Even more challenging is finding low-mass protostars, still shrouded in cocoons of cosmic dust. Researchers compared Webb’s data with ALMA’s past observations to identify five likely low-mass protostar candidates.
The team also identified 88 features that appear to be shocked hydrogen gas, where material being blasted out in jets from young stars impacts the surrounding gas cloud. Analysis of these features led to the discovery of a new star-forming cloud, distinct from the main Sagittarius C cloud, hosting at least two protostars powering their own jets.
“Outflows from forming stars in Sagittarius C have been hinted at in past observations, but this is the first time we’ve been able to confirm them in infrared light. It’s very exciting to see, because there is still a lot we don’t know about star formation, especially in the Central Molecular Zone, and it’s so important to how the universe works,” said Crowe.
Magnetic Fields and Star Formation
Webb’s 2023 image of Sagittarius C showed dozens of distinctive filaments in a region of hot hydrogen plasma surrounding the main star-forming cloud. New analysis by Bally and his team has led them to hypothesize that the filaments are shaped by magnetic fields, which have also been observed in the past by the ground-based observatories ALMA and MeerKAT (formerly the Karoo Array Telescope).
“The motion of gas swirling in the extreme tidal forces of the Milky Way’s supermassive black hole, Sagittarius A*, can stretch and amplify the surrounding magnetic fields. Those fields, in turn, are shaping the plasma in Sagittarius C,” said Bally.
The researchers think that the magnetic forces in the galactic center may be strong enough to keep the plasma from spreading, instead confining it into the concentrated filaments seen in the Webb image. These strong magnetic fields may also resist the gravity that would typically cause dense clouds of gas and dust to collapse and forge stars, explaining Sagittarius C’s lower-than-expected star formation rate.
“This is an exciting area for future research, as the influence of strong magnetic fields, in the center of our galaxy or other galaxies, on stellar ecology has not been fully considered,” said Crowe.
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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View/Download the science paper led by Bally from the The Astrophysical Journal.
View/Download the science paper led by Crowe from the The Astrophysical Journal.
Media Contacts
Laura Betz – laura.e.betz@nasa.gov
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Leah Ramsay – lramsay@stsci.edu
Space Telescope Science Institute, Baltimore, Md.
Christine Pulliam – cpulliam@stsci.edu
Space Telescope Science Institute, Baltimore, Md.
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Read more: press releases about the center of the Milky Way
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Last Updated Apr 02, 2025 Editor Marty McCoy Contact Laura Betz laura.e.betz@nasa.gov Related Terms
James Webb Space Telescope (JWST) Astrophysics Galaxies Galaxies, Stars, & Black Holes Goddard Space Flight Center Protostars Science & Research Stars The Milky Way The Universe View the full article
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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA’s SPHEREx, which will map millions of galaxies across the entire sky, captured one of its first exposures March 27. The observatory’s six detectors each captured one of these uncalibrated images, to which visible-light colors have been added to represent infrared wavelengths. SPHEREx’s complete field of view spans the top three images; the same area of the sky is also captured in the bottom three images. NASA/JPL-Caltech Processed with rainbow hues to represent a range of infrared wavelengths, the new pictures indicate the astrophysics space observatory is working as expected.
NASA’s SPHEREx (short for Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer) has turned on its detectors for the first time in space. Initial images from the observatory, which launched March 11, confirm that all systems are working as expected.
Although the new images are uncalibrated and not yet ready to use for science, they give a tantalizing look at SPHEREx’s wide view of the sky. Each bright spot is a source of light, like a star or galaxy, and each image is expected to contain more than 100,000 detected sources.
There are six images in every SPHEREx exposure — one for each detector. The top three images show the same area of sky as the bottom three images. This is the observatory’s full field of view, a rectangular area about 20 times wider than the full Moon. When SPHEREx begins routine science operations in late April, it will take approximately 600 exposures every day.
Each image in this uncalibrated SPHEREx exposure contains about 100,000 light sources, including stars and galaxies. The two insets at right zoom in on sections of one image, showcasing the telescope’s ability to capture faint, distant galaxies. These sections are processed in grayscale rather than visible-light color for ease of viewing.NASA/JPL-Caltech “Our spacecraft has opened its eyes on the universe,” said Olivier Doré, SPHEREx project scientist at Caltech and NASA’s Jet Propulsion Laboratory, both in Southern California. “It’s performing just as it was designed to.”
The SPHEREx observatory detects infrared light, which is invisible to the human eye. To make these first images, science team members assigned a visible color to every infrared wavelength captured by the observatory. Each of the six SPHEREx detectors has 17 unique wavelength bands, for a total of 102 hues in every six-image exposure.
Breaking down color this way can reveal the composition of an object or the distance to a galaxy. With that data, scientists can study topics ranging from the physics that governed the universe less than a second after its birth to the origins of water in our galaxy.
“This is the high point of spacecraft checkout; it’s the thing we wait for,” said Beth Fabinsky, SPHEREx deputy project manager at JPL. “There’s still work to do, but this is the big payoff. And wow! Just wow!”
During the past two weeks, scientists and engineers at JPL, which manages the mission for NASA, have executed a series of spacecraft checks that show all is well so far. In addition, SPHEREx’s detectors and other hardware have been cooling down to their final temperature of around minus 350 degrees Fahrenheit (about minus 210 degrees Celsius). This is necessary because heat can overwhelm the telescope’s ability to detect infrared light, which is sometimes called heat radiation. The new images also show that the telescope is focused correctly. Focusing is done entirely before launch and cannot be adjusted in space.
“Based on the images we are seeing, we can now say that the instrument team nailed it,” said Jamie Bock, SPHEREx’s principal investigator at Caltech and JPL.
How It Works
Where telescopes like NASA’s Hubble and James Webb space telescopes were designed to target small areas of space in detail, SPHEREx is a survey telescope and takes a broad view. Combining its results with those of targeted telescopes will give scientists a more robust understanding of our universe.
The observatory will map the entire celestial sky four times during its two-year prime mission. Using a technique called spectroscopy, SPHEREx will collect the light from hundreds of millions of stars and galaxies in more wavelengths any other all-sky survey telescope.
Track the real-time location of NASA’s SPHEREx space observatory using the agency’s 3D visualization tool, Eyes on the Solar System. When light enters SPHEREx’s telescope, it’s directed down two paths that each lead to a row of three detectors. The observatory’s detectors are like eyes, and set on top of them are color filters, which are like color-tinted glasses. While a standard color filter blocks all wavelengths but one, like yellow- or rose-tinted glasses, the SPHEREx filters are more like rainbow-tinted glasses: The wavelengths they block change gradually from the top of the filter to the bottom.
“I’m rendered speechless,” said Jim Fanson, SPHEREx project manager at JPL. “There was an incredible human effort to make this possible, and our engineering team did an amazing job getting us to this point.”
More About SPHEREx
The SPHEREx mission is managed by JPL for the agency’s Astrophysics Division within the Science Mission Directorate at NASA Headquarters. BAE Systems (formerly Ball Aerospace) built the telescope and the spacecraft bus. The science analysis of the SPHEREx data will be conducted by a team of scientists located at 10 institutions in the U.S., two in South Korea, and one in Taiwan. Caltech managed and integrated the instrument. Data will be processed and archived at IPAC at Caltech. The mission’s principal investigator is based at Caltech with a joint JPL appointment. The SPHEREx dataset will be publicly available at the NASA-IPAC Infrared Science Archive. Caltech manages JPL for NASA.
For more about SPHEREx, visit:
https://science.nasa.gov/mission/spherex/
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Calla Cofield
Jet Propulsion Laboratory, Pasadena, Calif.
626-808-2469
calla.e.cofield@jpl.nasa.gov
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Last Updated Apr 01, 2025 Related Terms
SPHEREx (Spectro-Photometer for the History of the Universe and Ices Explorer) Astrophysics Galaxies Origin & Evolution of the Universe The Search for Life The Universe Explore More
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