How Big Are Asteroids?
are moving away from each other at very great speeds. This means that the universe is expanding all the time since time it was formed. The Asteroid Asteroids are small rocky or icy bodies that orbit the sun. There are over 100,000 of them in orbit. Some measure less than 1 kilometer across, while the largest Asteroid is 1,003 kilometers big. Majority of Asteroids are fo0und in the orbit between Mars and Jupiter. Over 7000 asteroids have already been identified. Though Asteroids are smaller than any planet, a few of them have a diameter of more than 30 kilometers. Asteroid, Ida, has a tiny moon of its own and is the smallest known satellite in our solar system. Many asteroids have struck the Earth already. Scientists believe that such huge impacts resulted in the extinction of dinosaurs about 65 million years ago. How big is the universe? It is impossible for any human mind to imagine how big the universe might be. The reason for this is that, the earth is a very tiny part of the solar
