The Artemis II astronauts have a make-or-break moment in the dead of night

NASA's Artemis II astronauts will get a swift reminder on their first flight day that moon missions don't adhere to sleep demands. 

The historic human spaceflight, NASA's first beyond low-Earth orbit in over 50 years, launched from Cape Canaveral, Florida, on Wednesday evening at 6:35 p.m. ET. But even after that bone-rattling liftoff, the crew — Commander Reid Wiseman, pilot Victor Glover, Christina Koch, and Jeremy Hansen — won't have downtime. 

First, the rocket's upper stage places...