Watch as SpaceX test-fires Falcon 9 ahead of Starlink launch (members only)

SpaceX fueled its next Falcon 9 rocket at launch pad 39A and ignited the booster’s nine Merlin engines at sunset Thursday, passing a major step in the launch campaign leading up to liftoff of the Intelsat 35e communications satellite Sunday.

Almost exactly three days after taking off a few miles to the north at the Kennedy Space Center on SpaceX’s historic first crew launch, a 15-story-tall Falcon rocket booster returned to Florida’s Space Coast Tuesday aboard a football field-sized drone ship.

The first six broadband satellites for OneWeb, which envisions a constellation of hundreds of orbiting relay stations beaming Internet signals down to Earth, lifted off Wednesday aboard a Soyuz rocket from French Guiana. Launch occurred at 2137 GMT (4:37 p.m. EST).