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

Watch how the Space Launch System rocket RS-25 undergoes a core stage engine test-fire. Credit: NASA's Stennis Space Center ...

Add Yahoo as a preferred source to see more of our stories on Google. Nasa has taken another crack at fuelling its giant moon rocket after leaks halted a initial dress rehearsal and delayed the first ...

CAPE CANAVERAL, Fla. -- NASA said Tuesday it will now target a March launch of its new moon rocket after running into exasperating fuel leaks during a make-or-break test a day earlier. The space ...

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