Ariane 5

Live coverage: Ariane 5 launch scrubbed by sensor problem

Arianespace’s third Ariane 5 launch of the year was set liftoff Friday from Kourou, French Guiana, but an issue with a sensor on the rocket’s first stage liquid hydrogen tank caused officials to scrub the launch attempt. The Ariane 5 is poised to carry three U.S.-built commercial satellites into orbit, while testing a few rocket upgrades, including a modified fairing needed for the launch of the James Webb Space Telescope next year.

Atlas 5

NASA’s Perseverance rover leaves Earth bound for Mars

Persevering through a global pandemic, a last-minute earthquake, and the trials of a rocket launch, NASA’s next Mars rover — named Perseverance — took off from Cape Canaveral Thursday on a nearly seven-month journey to the Red Planet with sophisticated science instruments, technology to collect samples for to Earth, and the first interplanetary helicopter that could produce a “Wright Brothers moment” on another world.