Watch a 4K video replay of Falcon Heavy’s static fire test (members only)

Riding the rails to the launch pad Wednesday morning, the Atlas 5 rocket was rolled out to Cape Canaveral’s Complex 41 for liftoff Thursday night to deploy four NASA satellites that will probe Earth’s magnetosphere for a high-priority research project.

SpaceX next launch, slated to carry the company’s second set of Starlink broadband satellites into orbit, will be the first to fly with a reused Falcon 9 booster making its fourth flight when it takes off in the coming weeks.

Jamie Bock, a professor of physics at Caltech, is principal investigator of the SPHEREx astrophysics mission selected by NASA on Feb. 13 as the next medium-class mission in the agency’s line of Explorer probes.