Live coverage: Ariane 5 blasts off with two Intelsat satellites

Boeing Satellite Systems, Airbus Defense and Space and Orbital ATK have won orders from Luxembourg-based satellite operator SES for three new communications spacecraft for launch in 2017.

A Falcon 9 rocket was raised into position at pad 39A on Sunday for a customary test firing of its nine first stage Merlin engines. The rocket is being readied for a launch Thursday with a Dragon capsule carrying supplies to the International Space Station.

The U.S. military’s next GPS navigation satellite was ready for launch from Cape Canaveral at 9:43 p.m. EDT Friday (0143 GMT Saturday) aboard a SpaceX Falcon 9 rocket. But SpaceX aborted the countdown just two seconds prior to liftoff.