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

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

Arianespace’s third Ariane 5 launch of the year was set liftoff Friday from Kourou, French Guiana, but an issue with a sensor on the rocket’s first stage liquid hydrogen tank caused officials to scrub the launch attempt. The Ariane 5 is poised to carry three U.S.-built commercial satellites into orbit, while testing a few rocket upgrades, including a modified fairing needed for the launch of the James Webb Space Telescope next year.
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