A SpaceX Falcon 9 rocket lifted off from Vandenberg Space Force Base in California at 12:26 p.m. PDT (3:26 p.m. EDT; 1926 GMT) Friday with another batch of 52 Starlink internet satellites. The mission is the first of two SpaceX launches scheduled Friday, with another Falcon 9 poised for liftoff from Florida a little more than four hours later.

This is our comprehensive fact sheet previewing the United Launch Alliance Atlas 5 rocket deployment of the classified NROL-52 payload for the National Reconnaissance Office.

The scientist in charge of NASA’s OSIRIS-REx mission hopes to apply more than $30 million in leftover funding toward reducing the risk of the probe’s touch-and-go maneuver to snag a piece of asteroid Bennu, then eventually hire more experts to analyze the primordial specimens when they return to Earth in 2023.