Q&A with Keith Gendreau, principal investigator of the first X-ray space communications experiment (members only)

Forecasters predict mostly cloudy conditions and a chance of light rain for Tuesday morning’s scheduled takeoff of a SpaceX Falcon 9 rocket with a space station-bound supply ship, with a 40 percent chance weather could prevent liftoff during an instantaneous predawn launch opportunity.

Two weeks into its mission of exploration on Mars, NASA’s Perseverance rover is doing an “exceptional job” and has completed its first test drive, mission managers said Friday.

Watch a replay of the launch and landing of SpaceX’s Falcon 9 rocket on Jan. 7 at Cape Canaveral.