Live coverage: Veteran three-man crew docks with space station

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.

Astronauts Randy Bresnik and Mark Vande Hei headed outside the International Space Station Thursday on a spacewalk to replace one end of the lab’s Canadian-built robotic arm, a changeout that engineers say will restore the device to full capability.

The International Space Station’s crew will enjoy views of the Aug. 21 solar eclipse during three successive orbits, giving the astronauts a unique opportunity to take in the celestial show from 250 miles up as the moon’s shadow races across from the Pacific Ocean and the continental United States before moving out over the Atlantic.