Countdown begins for NASA's Artemis 1 moon mission and maiden flight of SLS megarocket - CBS News

The 46-hour, 10-minute countdown sets up a launch attempt at 8:33 a.m. EDT Monday at the opening of a two-hour window.
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 back.… [+5826 chars] Read More