Our Solar System The Solar System includes Sun, Meteorite, Astroids, Planets, Dwarf planets and the Kuiper belt. The Planets There were 9 planets in our Solar System. The 9th planet, Pluto, was discovered as a dwarf planet by a group of scientists at the Lowell Observatory including Clyde Tombaugh. Dwarf Planets Dwarf planets are small planets. I dwarf planet in the asteroid belt. Its name is Ceres. Most of the dwarf planets are TNOs (trans-neptunian object). Here is the picture of the 5 Dwarf Planets from wikipedia Here is the picture of trans-neptunian objects Meteorite A meteorite is a solid piece of debris from an object, such as a comet , asteroid , or meteoroid Kuiper Belt Kuiper belt is at the very edge of our solar system. It contains largely of frozen volatiles (termed "ices"), such as methane, ammonia and water. Asteroid belt solar system image from shutter stock