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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA marked a key milestone Feb. 18 with installation of RS-25 engine No. E20001, the first new production engine to help power the SLS (Space Launch System) rocket on future Artemis missions to the Moon.
The engine, built by lead SLS engines contractor L3Harris (formerly Aerojet Rocketdyne), was installed on the Fred Haise Test Stand in preparation for acceptance testing next month. It represents the first of 24 new flight engines being built for missions, beginning with Artemis V.
Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin Teams at NASA’s Stennis Space Center deliver, lift, and install the first new production RS-25 engine on the Fred Haise Test Stand on Feb. 18.NASA/Danny Nowlin The NASA Stennis test team will conduct a full-duration, 500-second hot fire, providing critical performance data to certify the engine for use on a future mission. During missions to the Moon, RS-25 engines fire for about 500 seconds and up to the 111% power level to help launch SLS, with the Orion spacecraft, into orbit.
The engine arrived at the test stand from the L3Harris Engine Assembly Facility on the engine transport trailer before being lifted onto the vertical engine installer (VEI) on the west side deck. After rolling the engine into the stand, the team used the VEI to raise and secure it in place.
The upcoming acceptance test follows two certification test series that helped verify the new engine production process and components meet all performance requirements. Four RS-25 engines help launch SLS, producing up to 2 million pounds of combined thrust.
All RS-25 engines for Artemis missions are tested and proven flightworthy at NASA Stennis prior to use. RS-25 tests are conducted by a team of operators from NASA, L3Harris, and Syncom Space Services, prime contractor for site facilities and operations.
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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
During the Apollo program, when NASA sent humans to the Moon, those missions took several days to reach the Moon. The fastest of these was Apollo 8, which took just under three days to go from Earth orbit to orbit around the Moon.
Now it’s possible to save some fuel by flying different kinds of trajectories to the Moon that are shaped in such a way to save fuel. And those trajectories can take more time, potentially weeks or months, to reach the Moon, depending on how you do it.
Mars is further away, about 50 percent further away from the Sun than Earth is. And reaching Mars generally takes somewhere between seven to ten months, flying a relatively direct route.
NASA’s Mars Reconnaissance Orbiter mission took about seven and a half months to reach Mars. And NASA’s MAVEN mission took about ten months to reach Mars.
Jupiter is about five times further away from the Sun than the Earth is. And so in order to make those missions practical, we have to find ways to reduce the fuel requirements. And the way we do that is by having the spacecraft do some flybys of Earth and or Venus to help shape the spacecraft’s trajectory and change the spacecraft’s speed without using fuel. And using that sort of approach, it takes between about five to six years to reach Jupiter.
So NASA’s Galileo mission, the first mission to Jupiter, took just a little over six years. And then NASA’s second mission to Jupiter, which was called Juno, took just under five years.
So to get to the Moon takes several days. To get to Mars takes seven to ten months. And getting to Jupiter takes between five and six years.
[END VIDEO TRANSCRIPT]
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Last Updated Feb 19, 2025 Related Terms
Science Mission Directorate Planetary Science Planetary Science Division The Solar System Explore More
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By NASA
The National Academy of Engineering (NAE) has elected three new members with NASA affiliations. Two employees and one retiree from three different NASA centers around the country were awarded the honor on Feb. 7.
Election to the NAE is among the highest professional distinctions accorded to an engineer. Individuals in the newly elected class will be formally inducted during the NAE’s annual meeting Oct. 1.
Academy membership honors those who have made outstanding contributions to “engineering research, practice, or education, including, where appropriate, significant contributions to the engineering literature” and to ‘the pioneering of new and developing fields of technology, making major advancements in traditional fields of engineering, or developing/implementing innovative approaches to engineering education.”
Christine Mann Darden, director (retired), Strategic Communications Office, NASA Langley Research Center, Hampton, Virginia.u003cstrongu003eu003cemu003eCredits: NASAu003c/emu003eu003c/strongu003e Christine Mann Darden, director (retired), Strategic Communications Office, NASA Langley Research Center, Hampton, Virginia, was awarded for pioneering research in supersonic flight technologies and leadership in advancing aerodynamics design to produce low-boom sonic effects. She is internationally known for her research into supersonic aircraft noise, especially sonic boom reduction, and recognized for her groundbreaking achievement as the first African American woman at NASA Langley to be appointed to the top management rank of Senior Executive Service. She is equally known for her efforts to inspire and educate generations of aerospace scientists and engineers.
Christa D. Peters-Lidard, deputy director, Science and Exploration, NASA Goddard Space Flight Center, Greenbelt, Maryland.u003cstrongu003eu003cemu003eCredits: NASA Office of the Chief Information Officeru003c/emu003eu003c/strongu003e Christa D. Peters-Lidard, director, Science and Exploration, NASA Goddard Space Flight Center, Greenbelt, Maryland, was honored for contributions to understanding land-atmosphere interactions, soil moisture monitoring and modeling, and leadership in Earth system modeling. Her research interests include the application of high-performance computing and communications technologies in Earth system modeling, for which her Land Information System team was awarded the 2005 NASA Software of the Year Award.
Vanessa E. Wyche, director, NASA Johnson Space Center, Houston.u003cstrongu003eu003cemu003eCredits: NASAu003c/emu003eu003c/strongu003e Vanessa E. Wyche, director, NASA’s Johnson Space Center, Houston, received the honor for leadership of NASA Johnson, enabling a commercial low-Earth orbit space economy and future Moon and Mars missions. She is responsible for a broad range of human spaceflight activities, including development and operation of human spacecraft, NASA astronaut selection and training, and mission control. Wyche oversees commercialization of low-Earth orbit – ensuring commercially provided destinations to continue research there following transition from the International Space Station in 2030. Additionally, she leads Johnson’s role in exploring the Moon and Mars with NASA’s Artemis spacecraft, including surface system capabilities for human and commercial robotic missions, and partners with academia, industry, and international community to establish a sustainable lunar economy.
Rob Gutro
NASA’s Goddard Space Flight Center
Robert.j.gutro@nasa.gov
L. Eileen Erickson / Kim Case
National Academy of Engineering
lerickson@nae.edu / KCase@nae.edu
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Last Updated Feb 10, 2025 Related Terms
Goddard Space Flight Center Johnson Space Center Langley Research Center People of Goddard View the full article
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By NASA
NASA/Ben Smegelsky A NASA photographer took this portrait of a curious sandhill crane on March 24, 2021, near the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida. Sandhill cranes are just one of the hundreds of types of birds that call the Merritt Island National Wildlife Refuge, which shares space with NASA Kennedy, their home.
See more photos of birds at NASA Kennedy.
Image credit: NASA/Ben Smegelsky
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