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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Syncom Space Services employees Kenneth Shipman, left, and Jesse Yarbrough perform final tubing install in early March to prepare the interstage simulator gas system on the Thad Cochran Test Stand at NASA’s Stennis Space Center for leak checks. Leak checks were performed prior to activation of the gas system this month. The activation marks a milestone in preparation for future Green Run testing of NASA’s exploration upper stage (EUS) in the B-2 position of the Thad Cochran Test Stand.NASA/Danny Nowlin Syncom Space Services employees Branson Cuevas, left, Kenneth Shipman, and Jesse Yarbrough install final tubing in early March before activation of the interstage simulator gas systems on the Thad Cochran Test Stand at NASA’s Stennis Space Center. The activation marks a milestone in preparation for future Green Run testing of NASA’s exploration upper stage (EUS) in the B-2 position of the stand.NASA/Danny Nowlin Crews at NASA’s Stennis Space Center recently completed activation of interstage gas systems needed for testing a new SLS (Space Launch System) rocket stage to fly on future Artemis missions to the Moon and beyond.
The activation marks a milestone in preparation for future Green Run testing of NASA’s exploration upper stage (EUS) in the B-2 position of the Thad Cochran Test Stand. For Green Run, teams will activate and test all systems to ensure the stage is ready to fly. Green Run will culminate with a hot fire of the stage’s four RL10 engines, just as during an actual mission.
The interstage simulator component will function like the SLS interstage section that protects the upper stage during Artemis launches. The interstage simulator will do the same during Green Run testing of the stage at NASA Stennis.
The interstage simulator gas system will provide helium, nitrogen, and hydrogen to the four RL10 engines for all wet dress and hot fire exercises and tests.
During the activation process, NASA Stennis crews simulated the engines and flowed gases to mirror various conditions and collect data on pressures and temperatures. NASA Stennis teams conducted 80 different flow cases, calculating such items as flow rates, system pressure drop, and fill/vent times. The calculated parameters then were compared to models and analytics to certify the gas system meets performance requirements.
NASA engineers Chad Tournillon, left, and Robert Smith verify the functionality of the control system in early March for activation of the interstage simulator gas systems on the Thad Cochran Test Stand at NASA’s Stennis Space Center. The activation marks a milestone in preparation for future Green Run testing of NASA’s exploration upper stage (EUS) in the B-2 position of the stand.NASA/Danny Nowlin Members of the engineering and operations team review data as it is collected in early March during activation of the interstage simulator gas systems on the Thad Cochran Test Stand at NASA’s Stennis Space Center. Pictured are NASA’s Mark Robinson, Robert Simmers, Jack Conley, and Nick Nugent. Activation of the gas systems marks a milestone in preparation for future Green Run testing of NASA’s exploration upper stage (EUS) in the B-2 position of the Thad Cochran Test Stand.NASA/Danny Nowlin NASA engineers Pablo Gomez, left, and B.T. Wigley collect data in early March during activation of the interstage simulator gas systems on the Thad Cochran Test Stand at NASA’s Stennis Space Center. The activation marks a milestone in preparation for future Green Run testing of NASA’s exploration upper stage (EUS) in the B-2 position of the NASA Stennis stand.NASA/Danny Nowlin Syncom Space Services employees Brandon Fleming, Robert Sheaffer, and Logan Upton review paperwork in early March prior to activation of the interstage simulator gas systems on the Thad Cochran Test Stand at NASA’s Stennis Space Center. The activation marks a milestone in preparation for future Green Run testing of NASA’s exploration upper stage (EUS) in the B-2 position of the stand.NASA/Danny Nowlin Syncom Space Services engineering tech Brandon Fleming tightens a pressure transducer on the Thad Cochran Test Stand at NASA’s Stennis Space Center in early March. Various transducers were used to provide data during subsequent activation of the interstage simulator gas systems at the stand. The activation marks a milestone in preparation for future Green Run testing of NASA’s exploration upper stage (EUS) in the B-2 position of the Thad Cochran Test Stand.NASA/Danny Nowlin Crews now will work to activate the umbilical gases and liquid oxygen systems. The NASA Stennis team will then conduct water system activation, where it will flow the flame deflector, aspirator, diffuser cooling circuits, purge rings and water-cooled fairing.
Afterward, the team will deploy the FireX system to check for total coverage, expected to be completed in the summer.
Before the exploration upper stage, built by Boeing at NASA’s Michoud Assembly Facility in New Orleans, arrives at NASA Stennis, crews will perform a final 24-hour check, or stress test, across all test complex facilities to demonstrate readiness for the test series.
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By European Space Agency
Satellite observations show that sea-surface temperatures over the past four decades have been getting warmer at an accelerated pace.
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By European Space Agency
Image: The Copernicus Sentinel-2 mission shows us what is left of the Aral Sea, once the fourth largest lake in the world. View the full article
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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
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
Keep Exploring Discover More Topics
Low Earth Orbit Economy
Commercial Space
Commercial Crew Program
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