At 10:23 a.m. EDT (1423 GMT) today (Aug. 27), the countdown clock began ticking down to the planned launch of NASA's Artemis 1 mission, an ambitious first flight to the moon by the agency's most ...

Countdown clocks began ticking Saturday for the maiden launch of NASA new Space Launch System rocket Monday on a long-awaited mission to send an unpiloted Orion crew capsule around the moon and ...

SpaceX had reset the countdown clock for its next human spaceflight, but a NASA decision has forced another delay of the ...

At 10:23 a.m. EDT (1423 GMT) today (Aug. 27), the countdown clock began ticking down to the planned launch of NASA’s Artemis 1 mission. The last Apollo mission took place on December 19, 1972 ...

NASA’s countdown clock began at 10:23 a.m. Saturday, with just under 48 hours to go before the rocket is scheduled to take off from the Kennedy Space Center in Florida.

NASA begins countdown for its mission around the moon Monday, ... I'm standing next to the big countdown clock and right by the giant vehicle assembly building with the American flag on it.

"We've had a really good day on the first day of our launch countdown," said NASA Test Director Jeff Spalding. "Yesterday, we picked up the count right on time at 9:53 and started our clock at 10: ...

NASA's countdown clocks are ticking again for the next-to-last space shuttle launch, and injured Congresswoman Gabrielle Giffords is heading back to Florida to watch. IE 11 is not supported.

Concerns over a critical hydraulic system arose less than four hours before the Falcon rocket's planned evening liftoff from ...

A launch pad problem prompted SpaceX to delay a flight to the International Space Station on Wednesday to replace NASA’s two stuck astronauts.