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 — ...

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

For the first time in half a century, countdown clocks began ticking Monday toward launch of a three-man one-woman crew on a trip to the moon and back, a major step in NASA's accelerated drive to ...

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 ...