Live coverage: Atlas 5 countdown and launch journal

A top secret surveillance payload owned by the National Reconnaissance Office soared into space Saturday from Vandenberg Air Force Base in California on top of a United Launch Alliance Delta 4-Heavy rocket, entering an unusual orbit not previously used by the U.S. government’s spy satellite fleet.

A Russian Soyuz spacecraft carrying three space station crew members hurtled back to Earth Thursday, completing a fiery plunge back through the atmosphere before settling to a frigid touchdown on the snowy steppe of Kazakhstan to close out a 139-day mission.

NASA held a pre-launch briefing for the Parker Solar Probe mission on Thursday, August 9, 2018, at the Kennedy Space Center.