The impending collision - predicted to happen at about 02:35 EDT (06:35 GMT) on Wednesday - is expected to captivate astronomers, both amateur and professional. It's not remotely dangerous, we can just watch the show," says Dr Matt Bothwell, public astronomer at the University of Cambridge. Given the Moon's lack of atmosphere and far weaker gravitational pull, the moment of impact will be "more impressive than any [similar] explosion on Earth", Bothwell said. More significant would be the educative potential of the impact, Bothwell noted. He said this moment would present a unique opportunity to study what happens when an object hits the Moon.