After an epic nine months in space, Nasa astronauts Butch Wilmore and Suni Williams are finally getting ready to head home. Their stay on the International Space Station (ISS) was only supposed to last eight days, but their mission was dramatically extended after the spacecraft that they arrived on suffered technical problems.

NASA plans to provide live coverage of both the undocking process and the ship's reentry into Earth's atmosphere through landing. People at home can watch the hatch closing with a broadcast that begins at 10:45 p.m. ET on March 17. Undocking will roll into the next day at 12:45 a.m. on March 18 .