Update for 12:30 pm ET: The Ax-1 astronaut crew's undocking from the International Space Station has been postponed to no earlier than Sunday, April 24, due to bad weather at SpaceX's splashdown sites. Undocking is now targeted for 8:55 p.m. EDT on Sunday (0055 April 25 GMT), with a splashdown planned for Monday at 1 p.m. EDT (1700 GMT).

The first-ever all-private astronaut mission to the International Space Station (ISS) is about to head for home, and you can watch the departure live.

A SpaceX Dragon capsule carrying the four crewmembers of the Ax-1 mission is scheduled to leave the orbiting lab today (April 23) after a two-week stay. The hatches between the Dragon and the ISS will close at about 4:30 p.m. EDT (2030 GMT), and the SpaceX craft will undock just over two hours later.