Photos: Delta 4 lights up the sky for night owl launch

SpaceX’s first Falcon Heavy launch for the U.S. Air Force took a major step closer to liftoff with a hold-down engine firing Wednesday night at launch pad 39A at NASA’s Kennedy Space Center in Florida. Liftoff with a cluster of experimental satellites and weather monitoring craft is set for June 24.

Orbital ATK’s seventh Antares rocket stands ready for launch with a Cygnus supply ship Saturday on a two-day flight to the International Space Station.

A SpaceX Falcon 9 rocket lifted off from Cape Canaveral’s Complex 40 launch pad Tuesday at 12:33 a.m. EST (0533 GMT) with Hispasat 30W-6, a communications satellite to relay video and broadband signals between the Americas, Europe and North Africa.