Live coverage: Atlas 5 countdown and launch journal

A Brazilian television broadcasting satellite and Europe’s next weather observatory packaged atop an Ariane 5 rocket lifted off at 2142 GMT (5:42 p.m. EDT) Wednesday from Kourou, French Guiana.

Fresh off its first terrestrial test drive, NASA’s Mars 2020 rover was displayed to media last week at the Jet Propulsion Laboratory in California before it’s packed up and flown across the country to Cape Canaveral in February to begin final launch preparations for liftoff in July.

The detective work into the Atlas 5 rocket’s first stage performance trouble during the Cygnus cargo ship launch a week ago has implicated the fuel system as the likely culprit for using up the liquid oxygen supply too quickly.