NASA cleared engineers to load more than 750,000 gallons of supercold propellants into the agency’s huge Space Launch System rocket Thursday in a second “wet dress rehearsal” countdown to verify leak ...

NASA ran into exasperating fuel leaks during a make-or-break test of its new moon rocket Monday, calling into question how soon astronauts could take off for a trip around the moon.The leaks — ...

A critical rocket test that will help determine when NASA can launch its first human moon mission in more than five decades appears to be on track after cold weather in Florida prompted a two-day ...

Countdown clocks began ticking Monday, setting the stage for launch of the Artemis II moon mission early Wednesday evening.

NASA started the countdown clock for Artemis II while SpaceX lined up another launch with a record-setting booster.

NASA and contractor engineers pumped more than 750,000 gallons of supercold propellants into the agency's huge Space Launch System rocket Thursday without any signs of hydrogen leaks in a major step ...

The leaks — reminiscent of the rocket's delayed debut three years ago — sprang just a couple hours into the daylong fueling operation at Kennedy Space Center. Launch controllers began loading the ...