SpaceX rocket thought to have crashed into the moon in unintentional collision

Four-tonne piece of SpaceX Falcon 9 rocket believed to have hit lunar surface on Wednesday at 5,400 miles an hour A four-tonne piece of a discarded SpaceX rocket that has been floating in space since last year is believed to have unintentionally crashed into the moon at high speed, in a collision that poses no danger to Earth but was expected to blast out a new lunar crater. The object, the size of a building, is part of the SpaceX Falcon 9 rocket that had launched a lunar lander from the US…