Video: SpaceX Falcon 9 countdown aborted

A rocket recovery team positioned off Florida’s East Coast is standing by for liftoff Sunday of a Falcon 9 launcher with a space weather satellite, but the demanding trajectory of the flight adds more unknowns to the company’s dicey endeavor to land the booster on a ship at sea.

A problem with a U.S. Air Force tracking radar kept a Falcon 9 rocket crowned with a NOAA space weather observatory grounded Sunday, forcing a long-delayed mission to stay on Earth an extra day.

Spectacular views from a NOAA space weather observatory show the sunlit far side of the moon crossing the face of the Earth from a distant vantage point a million miles away.