Live coverage: Atlas 5 countdown and launch journal

Orbital ATK has ordered another Atlas 5 rocket to launch a second commercial Cygnus cargo craft for the International Space Station.

Follow the key events of the Falcon 9 rocket’s ascent to orbit with the third set of 10 next-generation satellites for Iridium’s voice and data relay fleet.

Engineers scrambled to keep NASA’s billion-dollar asteroid-bound OSIRIS-REx spacecraft on track for its launch last week in the aftermath of an explosion a mile away at SpaceX’s launch pad at Cape Canaveral.