High winds in Florida forced SpaceX to move to Wednesday its planned launch of a $340 million sun-observing spacecraft, to be followed by a bid to recycle its Falcon 9 rocket.

The unmanned Deep Space Climate Observatory is now scheduled to blast off atop a SpaceX Falcon 9 rocket on Wednesday from Cape Canaveral, Florida at 6:03 pm (2303 GMT).

The mission has already been postponed in recent days due to rain and a radar failure.

"Safety prevails and we will recycle for launch tomorrow," said NASA commentator George Diller.

DSCOVR's goal is to help space weather forecasters by collecting data on solar wind and geomagnetic storms that can cause damage to electrical systems on Earth.

After the launch, SpaceX will make another attempt to guide the first stage of its Falcon 9 rocket back to a controlled landing on an ocean platform, as part of the California-based company's goal of making rockets one day as reusable as airplanes.

In January, the rocket attempted a controlled maneuver to land on a powered-barge in the Atlantic, but collided with it instead and broke into pieces.