Watch Ariane 5 launch with Star One D1 and JCSAT 15

A SpaceX Falcon 9 rocket lifted off with a pair of O3b internet satellites for SES Friday evening from Cape Canaveral Space Force Station, but a last-minute abort for a Falcon Heavy mission later in the night prevented the company from pulling off a launch doubleheader.

SpaceX’s next launch of satellites for the company’s Starlink broadband network — planned in the final days of 2019 — will carry one spacecraft with an experimental coating designed to make it less reflective in orbit, a first step in assuaging concerns from scientists who say the deployment of thousands more Starlink stations would impede some astronomical observations.

A United Launch Alliance Delta 4 rocket lifted off from Cape Canaveral at 8:26 p.m. EDT Friday (0026 GMT Saturday) with the U.S. Air Force’s tenth Wideband Global SATCOM satellite, extending the reach of the military’s highest-capacity satellite communications network.