Q&A with Steve Clarke, deputy associate administrator for exploration in NASA’s science division (members only)

Revisit Friday night’s blastoff of a United Launch Alliance Atlas 5 rocket from Cape Canaveral with SBIRS GEO Flight 4, the fourth in an upgraded line of U.S. Air Force missile detection and warning satellites.

Heading into the home stretch of a banner year, SpaceX launched its third Falcon 9 rocket flight of the month Monday with a Korean-owned commercial communications satellite built to connect customers across a swath from the Middle East to East Asia.

SpaceX broke another re-flight record on Friday evening with the launch of 23 more Starlink satellites on a Falcon 9 booster making its 18th flight. Liftoff from pad 40 at Cape Canaveral Space Force Station occurred at 8:37 p.m. EDT (0037 UTC on Nov. 4).