Live coverage: New Horizons flyby target comes into focus

JPL chief engineer Rob Manning, a veteran of Mars mission teams dating back to Mars Pathfinder more than two decades ago, describes how the InSight spacecraft will enter the Martian atmosphere and touch down on the red planet.

NASA’s Perseverance rover, set for liftoff Thursday on a journey to Mars, posed some unusual challenges for launch crews working with the robot’s plutonium-fueled power generator, but United Launch Alliance’s Atlas 5 rocket is uniquely suited for the job, the company’s CEO says.

An apparent exterior coolant leak from a Russian laboratory module at the International Space Station has been reported by the crew. It follows similar leaks that struck a Russian Soyuz crew ferry craft and a Progress cargo ship within the past year.