Q&A with Jeff Bezos, founder of Blue Origin

Maintaining a brisk flight rate three days after its last launch, SpaceX sent a Falcon 9 booster powered by a reused first stage into orbit Wednesday evening from Florida with an Airbus-built communications satellite for SES and EchoStar.

The centerpiece of the James Webb Space Telescope has arrived at NASA’s Johnson Space Center in Houston for a three-month test to ensure the observatory’s sensors and gold-coated mirrors work in the frigid temperatures of deep space.

Scott Bolton of the Southwest Research Institute leads the science team on NASA’s Juno mission, a robotic spacecraft now on final approach to Jupiter designed to probe the giant world’s deep interior and unravel how the solar system’s king planet formed.