The International Space Station returned to full strength with Saturday’s arrival of four new astronauts to replace colleagues who bailed early because of health concerns.

The two-woman, two-man crew is replacing four other station fliers who came home early last month due to a medical issue one was having.

A SpaceX rocket sent four astronauts to the International Space Station for an eight-month mission focused on microgravity.

NASA's SpaceX Crew-12 astronauts lifted off early Friday morning for their ride to the International Space Station.

A new crew rocketed toward the International Space Station on Friday to replace the astronauts who returned to Earth early in NASA's first medical evacuation. SpaceX launched the replacements as soon as possible at NASA’s request,

The crew will replace a team that evacuated the space station due to a medical emergency in January.

A SpaceX Dragon rocket took off just after 5 a.m. Friday en route to the International Space Station. Two NASA astronauts and two international astronauts are aboard. Josh Sanders has the latest information on the launch from the Pulse Desk.

SpaceX successfully launched four astronauts to the International Space Station on the Crew-12 mission. See video and photos of the launch here. SpaceX will launch the latest batch of astronauts to the International Space Station early Friday morning (Feb.