Snapshots from Atlas 5 launch

A replay of the United Launch Alliance Atlas 5 rocket launching the Air Force’s X-37B reusable spaceplane from Cape Canaveral, Florida.

United Launch Alliance announced Monday that the company will assume responsibility for commercial marketing and sales for Atlas 5 rocket missions, taking over for a Lockheed Martin division that previously sold Atlas 5 launch services on the commercial market.

The Cargo Dragon spacecraft, tail number C209, will carry 6,659 lbs. (3,021 kg.) of science and supplies to the orbiting outpost. Liftoff from pad 39A at NASA’s Kennedy Space Center happened Monday, April 21, at 4:15 a.m. EDT (0815 UTC).