As Britain tucks into its lunch on Friday, hundreds of scientists, engineers and astronomers on the other side of the planet will be nervously watching the skies. Across California and Hawaii, hundreds of eyes will be trained on the moon, watching for the moment when a hi-tech orbiter – weighing more than 2 tonnes and travelling at 5,600mph – plunges headlong into the lunar surface. The collision will throw a massive cloud of dust and debris up into space before, just a few minutes later, another, smaller, spacecraft follows suit and plummets to its doom.
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Nasa prepares moon smashing satellite
