Photos: Delta 4 lights up the sky for night owl launch

The step-by-step stacking of United Launch Alliance’s final Delta 2 rocket was completed in June at Vandenberg Air Force Base in California for liftoff Sept. 15 with an Earth science satellite for NASA.

The Atlas 5 rocket that will send NASA’s Perseverance rover toward Mars next month aced a countdown rehearsal Monday at Cape Canaveral, helping ensure the United Launch Alliance-built rocket is ready for liftoff during the rover’s 23-day launch window.

NASA has submitted a draft agreement for government approval that would allow Russian cosmonauts to begin flying to the International Space Station on U.S. crew capsules next year in a no-funds exchanged arrangement with Russia’s space agency. In return, Russia will continue launching U.S. and international astronauts on Soyuz missions.