A Falcon 9 rocket carrying about 40 payloads, including NASA's Pandora exoplanet satellite, is scheduled to lift off from California's Vandenberg Space Force Base during a 57-minute window that opens at 8:19 a.m. EST (1319 GMT and 5:19 a.m. local California time).

A member of the Crew-11 SpaceX mission suffered a medical event, prompting an early return to Earth for the four-person crew including NASA members.

A NASA spokeswoman said the astronaut with the medical concern, whom she did not identify, was in a stable condition on the orbiting laboratory.

Scientists say all signs indicate the so-called "megaberg" could be just days or weeks from totally disintegrating.

NASA Administrator Jared Isaacman details the Trump administration's 'ambitious' national space policy, nuclear spaceships, culture at NASA and more on 'My View with Lara Trump.'

NASA announced it's ending a mission to the International Space Station early because of a medical situation involving one of the astronauts aboard the station.

NASA announced on Friday evening (Jan. 9) that it plans to roll the Space Launch System (SLS) rocket and Orion spacecraft that will fly the Artemis 2 moon mission out to the pad for prelaunch checks on Jan. 17, weather and technical readiness permitting.

Nasa is considering an early return of some crew aboard the International Space Station (ISS) because of a medical issue involving one member of a four-strong team. The unnamed crew member is described as stable, but the incident has already led to the last-minute cancellation of a spacewalk.

Jared Isaacman, the new NASA administrator, signaled he was open to offering other spacecraft to Texas instead of the Discovery, housed at the Smithsonian.