NASA officials ordered the removal of one of the massive rocket's RS-25 main engines after discovering a hydraulic leak on the engine's main oxidizer valve actuator, which controls the flow of ...

Two NASA astronauts will step outside the International Space Station on Thursday to take part in U.S. Spacewalk 93, NASA's fifth-ever all-female spacewalk.

The Senate Commerce Committee cast votes on Wednesday to progress President Donald Trump's nominations for Nasa leadership ...

Isaacman, a commercial astronaut who has flown on two SpaceX missions, will now advance to a vote by the full Senate for ...