Watch a 4K video replay of Falcon Heavy’s static fire test (members only)

Two astronauts floated outside the International Space Station early Friday for the first of four planned spacewalks to wrap up a complex multi-year job to replace 48 aging batteries in the lab’s solar power system with 24 more powerful lithium-ion units.

A solid-fueled Chinese Kuaizhou launcher positioned to compete for worldwide business took off Monday on its first commercial mission with three small satellites to collect high-definition video and test communications technologies.

The Russian Soyuz MS-03 crew transport spacecraft is launched from the Baikonur Cosmodrome with three passengers on a two-day trek to the International Space Station.