The launch for the second Falcon Heavy rocket from the Kennedy Space Center in Florida has slipped until Wednesday at the earliest. The powerful rocket is due to carry the Arabsat 6A communications satellite into orbit.

An Ariane 5 rocket lifted off Thursday at 2345 GMT (7:45 p.m. EDT), flying from a French Guiana launch pad to geostationary transfer orbit with the ViaSat 2 and Eutelsat 172B communications satellites.

Europe’s new Aeolus winds observatory blasted off at 2120 GMT (5:20 p.m. EDT) Wednesday aboard a solid-fueled Vega rocket from French Guiana, kicking off a three-year mission to chart the motion of Earth’s atmosphere.