A NASA rocket has crashed onto the surface of the moon – but don’t panic, it’s exactly what the experts had planned.The collision into a crater on the south pole of the moon was part of a search for water or ice under the lunar surface. A probe that takes photographs followed close behind, crashing four minutes later. NASA had been hoping for a more spectacular impact, but in the end a screen went white and there were no immediate images of the rocket’s crash. Scientists wanted to examine the huge plume of dust expected to be created by the impact. The crash of the rocket was supposed to be like a blast of 1.5 tonnes of explosives.