Video: Missile alert satellite launches atop Atlas 5

Watch a 4K video replay of the launch of a SpaceX Falcon 9 rocket and Cargo Dragon spacecraft Dec. 6 on a resupply mission to the International Space Station.

SpaceX founder Elon Musk said a prototype for the company’s planned Starship launch vehicle passed a cryogenic proof test Sunday night in South Texas, clearing the way for teams to install a Raptor engine this week for a test-firing.

Virgin Orbit is setting modest expectations ahead of the company’s first attempt to reach orbit with a liquid-fueled air-launched rocket, emphasizing a hunger for flight data on the test launch, which could occur as soon as Monday off the coast of Southern California.