Asteroids
Asteroids are tiny, rocky bodies moving around the Sun. Most of the asteroids move between the orbits of Mars and Jupiter, but some of them beyond Neptune. The region in between Mars and Jupiter where the asteroids orbit is called 'asteroid belt'. About 10% of asteroids travel in groups far away from the asteriod belt. The groups of asteroids orbiting close to the Earth are the Amor, Apollo and Aten. Most of the asteroids are very tiny, but some are larger with a diameter of about 1,000 kilometres. The tiny asteroids like Gaspra, Mathilde, Ida etc. are irregular in shape and less than one kilometre in diameter.
