Photos: Atlas 5 rolls out for launch

The 721,000-pound United Launch Alliance Delta 4 rocket launches on-time at 2:36 p.m. EDT Wednesday into a deck of low-hanging clouds over Complex 37 at Cape Canaveral Air Force Station carrying the GPS 2F-9 navigation satellite.

Fans of classical mythology and the fictional Star Trek universe can vote for two new candidates as the name of United Launch Alliance’s next generation rocket, with Vulcan and Zeus joining three other options in an online poll revealed earlier this week.

Boeing and NASA officials said Thursday the first launch of astronauts on Boeing’s delay-prone Starliner crew capsule won’t happen in July after engineers recently discovered a problem with the spacecraft’s parachute system and identified flammable tape around wiring harnesses inside the vehicle.