Add Yahoo as a preferred source to see more of our stories on Google. A black and white spacecraft on a white rocket at its launch pad with an access arm. Watch it live here at Space.com; coverage ...

A SpaceX Falcon 9 will launch the four Ax-3 astronauts on Jan. 18 at 4:49 p.m. EST (2149 GMT). When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.