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

European engineers test-fired the world’s most powerful present-day single-segment solid rocket booster Monday in French Guiana, clearing a major development hurdle for the Vega-C and Ariane 6 launchers set for debuts in 2019 and 2020.

An upgraded model of SpaceX’s Falcon 9 rocket fired into orbit early Sunday from Florida’s Space Coast, hoisting a record-setting 7.8-ton communications satellite for Telesat toward its planned perch more than 22,000 miles over the equator.

The second test flight of Rocket Lab’s privately-developed Electron satellite booster could take off from New Zealand as soon as Friday night, U.S. time, after technical problems and high winds kept the rocket grounded during a series of launch attempts in December.