NASA has moved to replace the long-planned Exploration Upper Stage for its Space Launch System rocket with United Launch Alliance’s Vulcan Centaur 5 upper stage, a shift that could reshape the Artemis ...

"ULA’s Centaur (with minor modifications) is the only existing in-space propulsion stage capable of meeting the SLS upper stage design parameters and performance characteristics, while also meeting ...

NASA has canceled EUS and Block 1B/2 upgrades entirely, opting for a standardized upper stage to support ~10-month intervals ...

A pending contractor switchup marks another blow to Boeing, which is struggling to prove itself as a reliable strategic ...

SpaceX and Blue Origin hold Human Lander System (HLS) flight service contracts with NASA to ferry astronauts to and from ...

Artemis II has been plagued by similar issues to those faced by its predecessor, leading NASA to shake up its plan to return ...

AURORA, Colorado—Test engines meant to keep the B-52 Stratofortress in the skies through the bomber’s 100th birthday are expected to be delivered in 2027 after recent key performance evaluations, ...

NASA has discovered a helium leak in the SLS rocket's cryogenic propulsion stage. The issue was found after a previously successful wet dress rehearsal. Engineers are rolling the rocket back to the ...

CAPE CANAVERAL, Fla. — NASA took another crack at fueling its giant moon rocket Thursday after leaks halted the initial dress rehearsal and delayed the first lunar trip by astronauts in more than half ...

CAPE CANAVERAL, Fla. (AP) — NASA took another crack at fueling its giant moon rocket Thursday after leaks halted the initial dress rehearsal and delayed the first lunar trip by astronauts in more than ...