Photos: Atlas 5 rocket soars from West Coast

The United Launch Alliance Atlas 5 rocket, standing 197 feet tall and and weighing 1.2 million pounds, unleashes 2.4 million pounds of thrust from its main engine and four solid-fuel boosters at 6:42 p.m. EST (2342 GMT) Saturday to launch the GOES-R weather observer for NASA and NOAA from Cape Canaveral, Florida.

The 8-million-pound mobile service tower is retracted from around the Atlas 5 rocket, revealing the 19-story-tall vehicle for liftoff from Vandenberg Air Force Base, California, on NROL-55.

A pair of television broadcast satellites for AT&T and Eutelsat rocketed into orbit Thursday evening, riding a European Ariane 5 launcher into space in a spectacular sunset launch from the Guiana Space Center on the northeastern coast South America.