Four astronauts in training to fly around the moon early next year strapped into their Orion spacecraft this weekend for a dress rehearsal countdown in a major milestone toward launch. Based on ...

Fresh off repairs at the launch pad in Florida, United Launch Alliance engineers restarted the countdown overnight for the third attempt to send an Atlas V rocket and Boeing’s Starliner spacecraft on ...

* Remove mid-deck and flight-deck platforms (2 a.m.) * Activate and test navigational systems (7 a.m.) * Complete preparation to load power reactant storage and distribution system (9 a.m.) * Flight ...

The Artemis II crew completed a launch day simulation, a key step before their mission around the moon. The mission, slated for as early as February, will be a 10-day test flight aboard the Orion ...

A computer controlling the Atlas V rocket’s countdown triggered an automatic hold less than four minutes prior to liftoff of Boeing’s commercial Starliner spacecraft Saturday, keeping the crew test ...