Video: Soyuz MS-01 leaves the space station for landing

A record number of would-be space travelers have applied to join NASA’s corps of astronauts to fly aboard the International Space Station, the Orion crew capsule, or commercial spaceships built by Boeing and SpaceX, the space agency announced Friday.

The first operational flight of SpaceX’s Crew Dragon spacecraft with four astronauts aboard is set to launch from the Kennedy Space Center in Florida no earlier than Oct. 23, following a formal certification review to assess data from the Crew Dragon’s two-man test flight that concluded earlier this month, NASA said Friday.

Eric Boe, one of three astronauts assigned to the first piloted test flight of a Boeing CST-100 Starliner commercial crew ship later this year has been removed from the mission due to unspecified medical issues, NASA announced Tuesday. He will be replaced by veteran astronaut Mike Fincke.