The astronauts will now return on Sunday with a splashdown at 2:57 a.m. EDT (0657 GMT). "Resilience will undock from the Harmony module's space-facing international docking adapter during an automated maneuver on Saturday at 8:35 p.m. EDT," NASA officials said in a statement.

What happens when astronauts return to Earth?

In space, astronauts lose fluid volume—including up to 22% of their blood volume. Because it has less blood to pump, the heart will atrophy. ... Upon return to earth, the blood begins to pool in the lower extremities again, resulting in orthostatic hypotension."

What time astronauts return to Earth from space?

SpaceX's private Inspiration4 astronauts will return to Earth tonight and you can watch it live. Splashdown is set for 7:06 p.m. EDT (2306 GMT).