Normally it takes million of years for collisions to occur, so the scientists says that the only way another collision could be avoided is only by detecting the asteroids early and either destroying it or deviating it from the field of collision. For this there should be a very powerful telescope to detect any object coming towards the Earth, which would incur very high cost. So, the scientists are working preventing a great collision that could happen as billions of years ago. Other than the movie on Cosmic Collision there was several exhibits that I was able observe around the planetarium. The most interesting part of the exhibit was, they provide us with a clicker kind of a thing which if we press the exhibit number, and the clicker has a speaker which would provide explanations about the exhibit. This technology provided me with a great easiness in understanding the features of the exhibits. There were several interesting exhibits out of which I would be explaining some of the exhibits. We studied about the asteroid the fell in Northern Arizona in our class, and there was a small piece of the original asteroid displayed that created a meteor crater in Arizona. Meteor Crater, in Northern Arizona, is one of the Earth's youngest impact craters. Studies indicate the crater was formed around 50,000 years ago by an iron mass or masses traveling in excess of 7 miles per second and releasing 10 to 20 megatons of energy on impact with the