Time-lapse video: The Falcon Heavy goes vertical again

The mission is the first that will populate the 13th group of Starlink satellites in SpaceX’s megaconstellation. Liftoff from pad 39A at NASA’s Kennedy Space Center happened at 12:24 a.m. EST (0524 UTC).

A forecast of low ceilings, thick clouds and rainy weather Thursday has led NASA and Northrop Grumman officials to push back the launch of an Antares rocket and a space station-bound supply ship from Virginia’s Eastern Shore to Friday morning.

Two spacewalkers attached a new docking port to the International Space Station Friday, clearing the way for U.S. crew ferry ships being built by Boeing and SpaceX to begin test flights to the lab complex next year.