A backup launch window will open on Saturday at 5.50am BST (12.50am EDT).
You can watch the SpaceX launch in its entirety in the embedded video player below.
Alongside the 57 Starlink satellites, SpaceX’s Falcon 9 will carry two Earth-observation satellites for the company BlackSky.
Shortly after launch, SpaceX will attempt to land and recover the Falcon 9 booster rocket in the Atlantic Ocean.
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