Video: Falcon 9 launch with natural sound (members only)

A Proton rocket launched from the Baikonur Cosmodrome in Kazakhstan with the EchoStar 21 communications satellite Thursday, the heaviest commercial payload ever flown aboard a Russian booster.

The next 36 satellites for OneWeb’s broadband internet network fired into orbit from Russia’s Far East Friday on a Soyuz rocket, giving OneWeb 110 of a planned fleet of 650 spacecraft after the company emerged from bankruptcy earlier this year.

After an exhaustive investigation, SpaceX engineers have identified the most likely cause of the spectacular explosion of a Falcon 9 rocket during a pre-launch test Sept. 1 that destroyed the booster and its $195 million satellite payload, the company announced Monday.