Live coverage: Two-man crew departs space station, returns home

An independent panel has informed NASA that the James Webb Space Telescope will not be ready for launch until March 2021, and Congress will have to reauthorize the long-delayed, over-budget mission after breaching an $8 billion cost cap, officials said Wednesday.

Watch a replay of the launch Monday of an Orbital ATK Antares rocket carrying a commercial cargo craft destined for the International Space Station.

Flying without astronauts on a demonstration flight in Earth orbit, a test model of a next-generation Chinese crew capsule lifted off Tuesday on top of a heavy-lift Long March 5B rocket, the same launcher configuration that will loft segments of China’s planned space station.