SpaceX rocket fails once again to complete ocean platform landing
This photo obtained from SpaceX on Dec. 20, 2015 shows the Falcon 9 rocket in Cape Canaveral, Florida (AFP)

SpaceX said it failed again Friday to land its Falcon 9 rocket on an ocean platform after launch, following a successful mission to propel a communications satellite to a distant orbit.

"Rocket landed hard on the droneship. Didn't expect this one to work," said CEO Elon Musk on Twitter.

"But next flight has a good chance."