Live coverage: Rosetta’s final hours

Six weeks after launching from Cape Canaveral, an Israeli-built probe funded through private donations arrived in orbit around the moon Thursday, setting the the stage for the mission’s final descent to the lunar surface April 11.

SpaceX conducted its first launch from Florida in more than two months Thursday, when a Falcon 9 rocket lifted off from the Kennedy Space Center with the Qatari Es’hail 2 communications satellite at 3:46 p.m. EST (2046 GMT). The Falcon 9’s reused first stage landed on SpaceX’s drone ship in the Atlantic Ocean.

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.