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

With a fix in place for a propulsion system alarm that cut short a countdown in the final seconds Monday, U.S. time, Rocket Lab readied an Electron rocket for another try Wednesday night, but unfavorable upper level winds kept the booster grounded. The Electron rocket is awaiting launch on a test flight aiming to deliver three small commercial CubeSats to orbit from a remote New Zealand launch pad.

After a four-day delay due to a ground power supply anomaly and unfavorable weather, an Ariane 5 rocket lifted off at 4:23 p.m. EST (2123 GMT) Tuesday to send into orbit a hush-hush communications satellite for the Egyptian military and a spacecraft to expand the capacity of Inmarsat’s mobile Internet service.

A robotic space shuttle with stubby wings, tail fins, its belly covered with black thermal tiles, clam-shell doors that swing open to reveal a payload bay and a solar array for ultralong-duration missions rode into orbit Wednesday on the fourth mission of the Air Force’s reusable X-37B spaceplane project.