NASA fired up RS-25 engine No. 20001 at the Fred Haise Test Stand at NASA’s Stennis Space Center at Bay St. Louis, ...

NASA’s Space Launch System rocket and Orion spacecraft for the Artemis II mission arrived back at Launch Pad 39B on March 20, ...

For more than 60 years, nearly every large rocket used some combination of the same liquid and solid propellants. Refined ...

SpaceX chief Elon Musk said in February that the mighty Starship rocket would embark on its 12th test flight this month, although several more recent reports have suggested that it might not leave the ...

An unannounced test of NASA's towering Space Launch System rocket uncovered another issue with the vehicle meant to soon launch astronauts on a mission around the moon. Ground crews at the Kennedy ...

Reid Wiseman, Victor Glover, Christina Koch and Canadian astronaut Jeremy Hansen — on a flight around the far side of the moon and back.

Add Yahoo as a preferred source to see more of our stories on Google. Pressurized helium is used to push propellants to rocket engines for ignition and to purge various fuel lines to clear them out ...