Four astronauts are ready to spend five days in orbit on a mission that includes the first attempted spacewalk by private astronauts.

A SpaceX rocket carrying the 7,001st Starlink internet satellite launched into orbit from Florida today (Sept. 5), then aced its landing at sea.

SpaceX has scrubbed their Wednesday afternoon launch attempt of a Starlink mission. Now, 21 satellites are expected to head to low-Earth orbit tomorrow morning.