Videos: Replays from successful Atlas 5 launch of TDRS-M

The 60 Starlink satellites deployed Monday by a SpaceX Falcon 9 rocket have traced paths across twilight skies around the world this week, but their brightness is expected to dim as the spacecraft — designed to beam broadband signals down to Earth — spread out and climb to higher altitudes.

The 8-million-pound mobile service tower is retracted from around the Atlas 5 rocket, revealing the 189-foot-tall vehicle for liftoff from Vandenberg Air Force Base, California, carrying the commercial WorldView 4 Earth-imaging satellite.

United Launch Alliance is set to try again to launch a Delta 4-Heavy rocket and a classified U.S. government spy satellite Thursday after delays of more than three months caused by persistent issues with the mission’s launch pad.