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By NASA
3 min read
NASA’s Juno Back to Normal Operations After Entering Safe Mode
NASA’s Juno flies above Jupiter’s Great Red Spot in this artist’s concept. NASA/JPL-Caltech The spacecraft was making its 71st close approach to Jupiter when it unexpectedly entered into a precautionary status.
Data received from NASA’s Juno mission indicates the solar-powered spacecraft went into safe mode twice on April 4 while the spacecraft was flying by Jupiter. Safe mode is a precautionary status that a spacecraft enters when it detects an anomaly. Nonessential functions are suspended, and the spacecraft focuses on essential tasks like communication and power management. Upon entering safe mode, Juno’s science instruments were powered down, as designed, for the remainder of the flyby.
The mission operations team has reestablished high-rate data transmission with Juno, and the spacecraft is currently conducting flight software diagnostics.The team will work in the ensuing days to transmit the engineering and science data collected before and after the safe-mode events to Earth.
Juno first entered safe mode at 5:17 a.m. EDT, about an hour before its 71st close passage of Jupiter — called perijove. It went into safe mode again 45 minutes after perijove. During both safe-mode events, the spacecraft performed exactly as designed, rebooting its computer, turning off nonessential functions, and pointing its antenna toward Earth for communication.
Of all the planets in our solar system, Jupiter is home to the most hostile environment, with the radiation belts closest to the planet being the most intense. Early indications suggest the two Perijove 71 safe-mode events occurred as the spacecraft flew through these belts. To block high-energy particles from impacting sensitive electronics and mitigate the harmful effects of the radiation, Juno features a titanium radiation vault.
Including the Perijove 71 events, Juno has unexpectedly entered spacecraft-induced safe mode four times since arriving at Jupiter in July 2016: first, in 2016 during its second orbit, then in 2022 during its 39th orbit. In all four cases, the spacecraft performed as expected and recovered full capability.
Juno’s next perijove will occur on May 7 and include a flyby of the Jovian moon Io at a distance of about 55,300 miles (89,000 kilometers).
More About Juno
NASA’s Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Juno mission for the principal investigator, Scott Bolton, of the Southwest Research Institute in San Antonio. Juno is part of NASA’s New Frontiers Program, which is managed at NASA’s Marshall Space Flight Center in Huntsville, Alabama, for the agency’s Science Mission Directorate in Washington. The Italian Space Agency (ASI) funded the Jovian InfraRed Auroral Mapper. Lockheed Martin Space in Denver built and operates the spacecraft. Various other institutions around the U.S. provided several of the other scientific instruments on Juno.
More information about Juno is available at:
https://www.nasa.gov/juno
News Media Contacts
DC Agle
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-9011
agle@jpl.nasa.gov
Karen Fox / Molly Wasser
NASA Headquarters, Washington
202-358-1600
karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov
Deb Schmid
Southwest Research Institute, San Antonio
210-522-2254
dschmid@swri.org
2025-049
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Last Updated Apr 09, 2025 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 Space Force
The DoD is offering a path back to service for military personnel who voluntarily separated or left to avoid the COVID-19 vaccination mandate.
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By European Space Agency
Video: 00:06:44 The European Space Agency’s Euclid mission has scouted out the three areas in the sky where it will eventually provide the deepest observations of its mission.
In just one week of observations, with one scan of each region so far, Euclid already spotted 26 million galaxies. The farthest of those are up to 10.5 billion light-years away.
In the coming years, Euclid will pass over these three regions tens of times, capturing many more faraway galaxies, making these fields truly ‘deep’ by the end of the nominal mission in 2030.
The first glimpse of 63 square degrees of the sky, the equivalent area of more than 300 times the full Moon, already gives an impressive preview of the scale of Euclid’s grand cosmic atlas when the mission is complete. This atlas will cover one-third of the entire sky – 14 000 square degrees – in this high-quality detail.
Explore the three deep field previews in ESASky:
- Euclid Deep Field South
- Euclid Deep Field Fornax:
- Euclid Deep Field North:
Read more: Euclid opens data treasure trove, offers glimpse of deep fields
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By NASA
NASA astronauts Nick Hague, Suni Williams, Butch Wilmore, and Roscosmos cosmonaut Aleksandr Gorbunov land in a SpaceX Dragon spacecraft in the water off the coast of Tallahassee, Florida on March 18, 2025. Hague, Gorbunov, Williams, and Wilmore returned from a long-duration science expedition aboard the International Space Station. Credit: NASA/Keegan Barber NASA’s SpaceX Crew-9 completed the agency’s ninth commercial crew rotation mission to the International Space Station on Tuesday, splashing down safely in a SpaceX Dragon spacecraft off the coast of Tallahassee, Florida, in the Gulf of America.
NASA astronauts Nick Hague, Suni Williams, and Butch Wilmore, and Roscosmos cosmonaut Aleksandr Gorbunov, returned to Earth at 5:57 p.m. EDT. Teams aboard SpaceX recovery vessels retrieved the spacecraft and its crew. After returning to shore, the crew will fly to NASA’s Johnson Space Center in Houston and reunite with their families.
“We are thrilled to have Suni, Butch, Nick, and Aleksandr home after their months-long mission conducting vital science, technology demonstrations, and maintenance aboard the International Space Station,” said NASA acting Administrator Janet Petro. “Per President Trump’s direction, NASA and SpaceX worked diligently to pull the schedule a month earlier. This international crew and our teams on the ground embraced the Trump Administration’s challenge of an updated, and somewhat unique, mission plan, to bring our crew home. Through preparation, ingenuity, and dedication, we achieve great things together for the benefit of humanity, pushing the boundaries of what is possible from low Earth orbit to the Moon and Mars.”
Hague and Gorbunov lifted off at 1:17 p.m. Sept. 28, 2024, on a SpaceX Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida. The next day, they docked to the forward-facing port of the station’s Harmony module. Williams and Wilmore launched aboard Boeing’s Starliner spacecraft and United Launch Alliance Atlas V rocket on June 5, 2024, from Space Launch Complex 41 as part of the agency’s Boeing Crew Flight Test. The duo arrived at the space station on June 6. In August, NASA announced the uncrewed return of Starliner to Earth and integrated Wilmore and Williams as part of the space station’s Expedition 71/72 for a return on Crew-9. The crew of four undocked at 1:05 a.m. Tuesday to begin the trip home.
Williams and Wilmore traveled 121,347,491 miles during their mission, spent 286 days in space, and completed 4,576 orbits around Earth. Hague and Gorbunov traveled 72,553,920 miles during their mission, spent 171 days in space, and completed 2,736 orbits around Earth. The Crew-9 mission was the first spaceflight for Gorbunov. Hague has logged 374 days in space over his two missions, Williams has logged 608 days in space over her three flights, and Wilmore has logged 464 days in space over his three flights.
Throughout its mission, Crew-9 contributed to a host of science and maintenance activities and technology demonstrations. Williams conducted two spacewalks, joined by Wilmore for one and Hague for another, removing a radio frequency group antenna assembly from the station’s truss, collecting samples from the station’s external surface for analysis, installing patches to cover damaged areas of light filters on an X-ray telescope, and more. Williams now holds the record for total spacewalking time by a female astronaut, with 62 hours and 6 minutes outside of station, and is fourth on the all-time spacewalk duration list.
The American crew members conducted more than 150 unique scientific experiments and technology demonstrations between them, with over 900 hours of research. This research included investigations on plant growth and quality, as well as the potential of stem cell technology to address blood diseases, autoimmune disorders, and cancers. They also tested lighting systems to help astronauts maintain circadian rhythms, loaded the first wooden satellite for deployment, and took samples from the space station’s exterior to study whether microorganisms can survive in space.
The Crew-9 mission was the fourth flight of the Dragon spacecraft named Freedom. It also previously supported NASA’s SpaceX Crew-4, Axiom Mission 2, and Axiom Mission 3. The spacecraft will return to Florida for inspection and processing at SpaceX’s refurbishing facility at Cape Canaveral Space Force Station, where teams will inspect the Dragon, analyze data on its performance, and begin processing for its next flight.
The Crew-9 flight is part of NASA’s Commercial Crew Program, and its return to Earth follows on the heels of NASA’s SpaceX Crew-10 launch, which docked to the station on March 16, beginning another long-duration science expedition.
The goal of NASA’s Commercial Crew Program is safe, reliable, and cost-effective transportation to and from the space station and low Earth orbit. The program provides additional research time and has increased opportunities for discovery aboard humanity’s microgravity testbed for exploration, including helping NASA prepare for human exploration of the Moon and Mars.
Learn more about NASA’s Commercial Crew Program at:
https://www.nasa.gov/commercialcrew
-end-
Amber Jacobson / Joshua Finch
Headquarters, Washington
202-358-1100
amber.c.jacobson@nasa.gov / joshua.a.finch@nasa.gov
Kenna Pell / Sandra Jones
Johnson Space Center, Houston
281-483-5111
kenna.m.pell@nasa.gov / sandra.p.jones@nasa.gov
Steve Siceloff / Stephanie Plucinsky
Kennedy Space Center, Florida
321-867-2468
steven.p.siceloff@nasa.gov / stephanie.n.plucinsky@nasa.gov
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Last Updated Mar 18, 2025 EditorJessica TaveauLocationNASA Headquarters Related Terms
Humans in Space Expedition 72 International Space Station (ISS) ISS Research Space Operations Mission Directorate View the full article
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