Live coverage: Delta 4 countdown and launch journal

Payload readiness has delayed next weekend’s planned Delta 4-Heavy rocket launch for the U.S. National Reconnaissance Office.

The U.S. Air Force on Friday made its first public confirmation that the X-37B unmanned space shuttle will be launched next month on the fourth flight of an Orbital Test Vehicle.

NASA’s OSIRIS-REx spacecraft is about to be sealed inside the nose fairing of its Atlas 5 rocket booster for a seven-year voyage to asteroid Bennu and back to Earth on a mission to seek out clues to the origin of life and the chaotic early solar system.