NASAâs Deep Impact is a really astonishing project. You may know by now that the mission is about sending a spacecraft toward comet Temple 1 to make an artificial impact with it. This way, one can seek the material beneath the surface of that comet which has the same age as the solar system. This helps us to find out more about the early ages of solar system.
IMO, the mission would be considered as science fiction ten or twenty years ago.