Watch live: SpaceX Falcon 9 rocket launches pair of O3b mPOWER satellites from Kennedy Space Center

Watch live coverage as SpaceX launches a Falcon 9 rocket with the O3b mPOWER 7 & 8 satellites headed to a medium Earth orbit. Liftoff from pad 39A at NASA's Kennedy Space Center is scheduled for 5:26 p.m. EST (2226 UTC) on Tuesday, Dec. 17, which is the end of a one-hour 27-minute launch window. About eight and a half minutes after liftoff, the first stage booster, making its 19th flight, will make a landing on the drone ship 'Just Read the Instructions' stationed in the Atlantic Ocean.

The Falcon 9 will head away from Cape Canaveral on an easterly trajectory. The O3b mPOWER 7 & 8 communication satellites are being launched for Luxembourg-based SES. This will be is the fourth pair of these satellites to be launched.

Commentary will be provided by Spaceflight Now's Will Robinson-Smith, starting approximately an hour prior to liftoff.

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