Four crew members of the International Space Station (ISS) are preparing for a medical evacuation on Wednesday after one of the astronauts suffered an undisclosed health issue. Nasa ’s SpaceX Crew-11 mission will return to Earth aboard a Dragon capsule at 5.05pm EST (10.05pm in the UK), several weeks ahead of schedule.

This week NASA announced a list of launch opportunities for Artemis II , the mission that will bring 4 astronauts including North Carolina's own Christina Koch. But how is each selected?

While the rollout is a big milestone, experts say the final launch date could still change depending on Florida's weather and final technical checks.