Snapshots from Atlas 5 launch

NASA’s Perseverance rover is racing toward Mars for a daring high-speed plunge into the Red Planet’s atmosphere Thursday, ready to use a heat shield, a supersonic parachute, and braking rockets for a pinpoint touchdown on a dried-up river delta that may harbor clues about the potential for past life.

NASA’s $8.8 billion James Webb Space Telescope has completed critical end-to-end testing in a giant vacuum chamber at the Johnson Space Center, proving the telescope will work properly in the deep cold of space, bring starlight to a sharp focus and precisely track its astronomical targets when launched in 2019.

The maker of inflatable technology for a commercial space station will use a top-of-the-line Atlas 5 rocket with a stretched nose cone to hoist the first habitat into Earth orbit in 2020.