Photos: Atlas 5 rolls out for launch

The Centaur upper stage launching the Cygnus space freighter Tuesday persevered through a velocity shortfall from the first stage of the Atlas 5 rocket, improvising with a longer firing to reach the correct orbit.

A United Launch Alliance Delta 4-Heavy rocket climbed into orbit Monday from a military base northwest of Los Angeles, delivering to space a classified U.S. government spy satellite as large as a school bus and leaving just three Delta rockets left to fly before retirement.

NASA’s Tracking and Data Relay Satellite-M, a communications router for the space station and dozens of science spacecraft, blasted off from Cape Canaveral at 8:29 a.m. EDT on Friday atop a United Launch Alliance Atlas 5 rocket.