Video: Falcon 9 fires up engines for static fire test (members only)

The launch of the first batch of new-generation Iridium communications satellites Saturday marked the beginning of the end for the predictable, spectacular flares of reflected sunlight produced by the old-design craft, a favorite of amateur skywatchers for nearly two decades.

This is the pre-launch news conference held Dec. 2 at NASA’s Kennedy Space Center for liftoff of the Orbital ATK commercial Cygnus cargo ship aboard a United Launch Alliance Atlas 5 rocket for the International Space Station.

SpaceX’s proposal to land astronauts on the moon using the company’s reusable Starship vehicle could be “game-changing” for space exploration, but comes with risks and complexity that “threaten the schedule viability” to achieve NASA’s goal of returning crews moon by the end of 2024, agency officials said.