NASA’s first crewed moon mission in decades was delayed as its engineers grapple with an all-too-familiar rocket problem: hydrogen leaks. Fixing the issue is even trickier than it may seem.

During launches, the Super Heavy booster’s cluster of engines generates enormous thrust and shockwaves. Without suppression, ...

NASA is facing a race against time to save its 21-year-old spacecraft, the Neil Gehrels Swift Observatory, which has been on ...

Fixing the Space Launch System rocket's helium pressurization problem has pushed the Artemis II launch to at least April 1.

NASA's 2nd wet dress rehearsal is underway in Florida as the agency prepares to test-fuel the towering Space Launch System ...

NASA will again attempt to fuel up its moon rocket and do a launch-day walkthrough ahead of its Artemis II mission to send four astronauts around the moon.

NASA will roll its Artemis 2 moon rocket off the launch pad on Wednesday (Feb. 25) to deal with a glitch, and you can watch the long trek live.

This image provided by NASA shows NASA’s moon rocket sits on the pad at Kennedy Space Center in Florida on Thursday, Feb. 19, ...

The delay was caused by a hydrogen leak discovered during a key fueling test known as a wet dress rehearsal. The mission will send a crew of four astronauts, including three Americans and one Canadian ...

It's been a busy week for NASA's Artemis lunar campaign, which has experienced a number of recent setbacks as the agency has again delayed the first crewed mission under the program. The launch date ...

NASA is now targeting March for the earliest possible launch of its historic Artemis II lunar moon mission, which will send four astronauts into deep space for the first time since the Apollo program ...

Add Yahoo as a preferred source to see more of our stories on Google. The Space Launch System (SLS) rocket at Launch Pad 39B at the Kennedy Space Center in Cape Canaveral, Florida, on January 30. - ...