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By NASA
NASA tested RS-25 engine No. 20001 on June 20, at the Fred Haise Test Stand at NASA’s Stennis Space Center at Bay St. Louis, Mississippi. Test teams fired the engine for almost eight-and-a-half minutes (500 seconds), the same amount of time RS-25 engines fire during a launch of an SLS (Space Launch System) rocket on Artemis missions to the Moon. NASA NASA tested RS-25 engine No. 20001 on June 20, at the Fred Haise Test Stand at NASA’s Stennis Space Center at Bay St. Louis, Mississippi. Test teams fired the engine for almost eight-and-a-half minutes (500 seconds), the same amount of time RS-25 engines fire during a launch of an SLS (Space Launch System) rocket on Artemis missions to the Moon. The Artemis campaign will explore the Moon for scientific discovery, economic benefits, and to build the foundation for the first crewed missions to Mars – for the benefit of all.
Four RS-25 engines, built by contractor L3Harris Technologies (formerly Aerojet Rocketdyne), help power each SLS launch, producing up to 2 million pounds of combined thrust. During the test, operators also fired engine No. 20001 up to the 111% power level, the same amount of thrust needed to launch an SLS rocket, carrying the Orion spacecraft, to orbit. The full-duration “hot fire” was the first test since NASA completed certification testing for new production RS-25 engines in 2024.
All RS-25 engines are tested and proven flightworthy at NASA Stennis. The test was conducted by a team of operators from NASA, L3Harris, and Syncom Space Services, prime contractor for site facilities and operations.
Explore More NASA Stennis Images View the full article
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By Amazing Space
LIVE NOW: Sun Close up Views/ 21st JUNE / Summer Solstice Backyard Astronomy with Lunt Telescope
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By NASA
NASA astronauts (left to right) Anne McClain and Nichole Ayers pose for a portrait together aboard the International Space Station. Moments earlier, Ayers finished trimming McClain’s hair using an electric razor with a suction hose attached that collects the loose hair to protect the station’s atmosphere.NASA Students from New York and Utah will hear from NASA astronauts aboard the International Space Station as they answer prerecorded questions in two separate events.
At 11:30 a.m. EDT on Monday, June 23, NASA astronauts Nichole Ayers and Anne McClain will answer questions submitted by students from P.S. 71 Forest Elementary School in Ridgewood, New York. Media interested in covering the event must RSVP by 5 p.m. Friday, June 20, to Regina Beshay at: rbeshay2@school.nyc.gov or 347-740-6165.
At 11:05 a.m. on Friday, June 27, Ayers and McClain will answer questions submitted by students from Douglas Space and Science Foundation, Inc., in Layton, Utah. Media interested in covering the event must RSVP by 5 p.m. Wednesday, June 25, to Sarah Merrill at: sarahmonique@gmail.com or 805-743-3341.
Watch the 20-minute Earth-to-space calls on NASA STEM YouTube Channel.
P.S. 71 Forest Elementary School will host kindergarten through fifth grade students. Douglas Space and Science Foundation will host participants from the Science, Technology, Achievement Research camp. Both events aim to inspire students to imagine a future in science, technology, engineering, and mathematics careers through ongoing collaborations, mentorship, and hands-on learning experiences.
For nearly 25 years, astronauts have continuously lived and worked aboard the space station, testing technologies, performing science, and developing skills needed to explore farther from Earth. Astronauts aboard the orbiting laboratory communicate with NASA’s Mission Control Center in Houston 24 hours a day through SCaN’s (Space Communications and Navigation) Near Space Network.
Important research and technology investigations taking place aboard the space station benefit people on Earth and lays the groundwork for other agency missions. As part of NASA’s Artemis campaign, the agency will send astronauts to the Moon to prepare for future human exploration of Mars; inspiring explorers and ensuring the United States continues to lead in space exploration and discovery.
See videos of astronauts aboard the space station at:
https://www.nasa.gov/stemonstation
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Gerelle Dodson
Headquarters, Washington
202-358-1600
gerelle.q.dodson@nasa.gov
Sandra Jones
Johnson Space Center, Houston
281-483-5111
sandra.p.jones@nasa.gov
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Last Updated Jun 18, 2025 LocationNASA Headquarters Related Terms
Humans in Space In-flight Education Downlinks International Space Station (ISS) Johnson Space Center NASA Headquarters View the full article
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