NASA’s Next Moon Rocket Runs on Shuttle Engines—Here’s the Story Behind Each One

NASA is getting ready to launch its massive, fully expendable rocket for the first crewed flight to the Moon since Apollo.
NextBigFutureOpinion

20 Years of SLS and Constellation – 50 Years of the Same RS25 Engine and Each One Costs $145 Million

SLS (Space Launch System) uses a 50 year old rocket engine design that now costs $145 million each (not including labor and ...