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COMETS AND ASTEROIDS
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There are billions of comets in the Solar System, living at the edge of it and forming the enormous spherical Oort Cloud. Individually, there are small, irregularly shaped lumps of snow and dust, each following its own orbit around the Sun. Once it leaves the Cloud and it will travels into the inner Solar System. When it gets closer to the Sun, its nucleus will develop a huge head and formed two long tails. It will be large enough to see from the Earth.

Billions of space rocks that are known as Asteroids. It will orbit the Sun within the inner Solar System. Asteroids are also called as minor planets because each one follows its own orbit around the Sun, it also spins as it travels. The Asteroid Belt or Main Belt lies between the orbits of Mars and Jupiter. Ceres the largest asteroids, its diameter is about 935 km.