Universe is boundless, vast, has no end and no beginning. For universe, our planet earth is a tiny minuscule planet. Whatever we may think that we know about universe is still 1/million times of what the universe may actually comprise of. Every theory may fail at those large distances. For instance, the distance between two galaxies is in the ranges of a million light years. A light year is the distance traveled by the light in one year. Light is so fast that it can cover 3 lakh kilometers in a second. Till the time we hadn't discovered radio, communication satellites and airplanes, even earth used to look like a big giant planet. It used to take months and year to travel from one corner of earth to the other. But now with the advent of technology, world has become a global village. One can connect with his long distance friend with skype in seconds for free of cost. With supersonic and hypersonic planes it takes merely 5-6 hours to reach to the any corner of earth. Communicatio...