Live coverage: Two satellites lift off aboard Ariane 5

Two U.S.-built Intelsat communications satellites have hitched on to an Ariane 5 rocket for launch from French Guiana next week, the first time the storied company has put two of its spacecraft on the same booster.

Extra testing of the James Webb Space Telescope and delays in assembling the powerful observatory will push back the $10 billion mission’s launch by at least six months to early 2019, officials announced last week as the telescope successfully completed an extensive performance test inside a cryogenic vacuum chamber in Houston.

The first Soyuz launch from Kazakhstan carrying a full load of more than 30 Florida-built satellites for OneWeb’s broadband Internet network has slipped from December to mid-to-late January, OneWeb officials said.