Asteroids are small, rocky bodies that orbit the sun in between the orbits of Mars and Jupiter, which is anywhere from 2.1 AU (1.95×108 mi / 3.15×108 km) to 3.2 AU (3.0×108 mi / 4.8×108 km) from the sun. There are more than 20,000 known asteroids. They are irregularly shaped and vary in size [...]