Launching the second pair of Geosynchronous Space Situational Awareness Program satellites for the U.S. military, a United Launch Alliance Delta 4 rocket thundered away from Cape Canaveral today at 12:52 a.m. EDT (0452 GMT).

Take a walk around NASA’s OSIRIS-REx spacecraft less than three weeks before its Sept. 8 launch on top of an Atlas 5 rocket. Rich Kuhns, the mission’s program manager from Lockheed Martin, points out some of the major features on the probe.

A United Launch Alliance Atlas 5 rocket lifted off from Cape Canaveral at 11:11 a.m. EDT (1511 GMT) today to boost Orbital ATK’s commercially-operated Cygnus cargo ship toward a Saturday rendezvous with the International Space Station. Follow the ascent in our live journal.