Live coverage: Two satellites lift off aboard Ariane 5

Arianespace’s launch team in French Guiana rolled an Ariane 5 booster to its launch pad Tuesday and readied the rocket for liftoff Wednesday with an Inmarsat satellite to connect airline passengers over Europe and an Indian communications craft.

Engineers working on the James Webb Space Telescope, which had its launch delayed to 2020 earlier this year, recently discovered another problem during testing at the observatory’s prime contractor Northrop Grumman in Southern California.

A Soyuz rocket carrying Russian commander Sergey Ryzhikov, flight engineer Sergey Kud-Sverchkov, and veteran NASA astronaut Kate Rubins blasted off from the Baikonur Cosmodrome in Kazakhstan at 1:45 a.m. EDT (0545 GMT) Wednesday. The Soyuz crew took off on a three-hour express trip to the International Space Station that culminated in a docking at 4:48 a.m. EDT (0848 GMT).