Live coverage of the countdown and launch of a Falcon 9 rocket from Vandenberg Space Force Base in California with 16 satellites for OneWeb’s internet network and five satellites for Iridium’s voice and data relay constellation. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
Related Articles

Q&A with Guido Levrini, ESA’s manager of the Copernicus space segment
Europe is in the midst of launching the most thorough space-based environmental network ever deployed, with satellites to help officials respond to natural disasters, measure crop yield, monitor the health of oceans and ice caps, and track ozone in the atmosphere. Guido Levrini from ESA spoke to Spaceflight Now about the program on the eve of Sentinel 1B’s launch.

Starliner test flight to use special Atlas 5 configuration, unusual launch trajectory
The 81st flight of a United Launch Alliance Atlas 5 rocket, set for liftoff Friday from Cape Canaveral, will come with its share of firsts when it sends Boeing’s Starliner crew capsule toward the International Space Station on an unpiloted test flight. The launcher will fly without a payload shroud, which typically envelopes satellites during liftoff, and it will debut an uprated dual-engine Centaur upper stage that will power the Starliner on a unique suborbital trajectory optimized for astronaut comfort.
