Planets

A planet is a large Astronomical object that has become large enough to pull its self in to a spherical shape, but not enough for nuclear fusion. they are usually found orbiting stars but some don't orbit any thing. there are many types of planets which range from Dwarf planets to Gas giants. some planets have moons orbiting them.

Main types
Dwarf: these are small planets that haven't cleared their Orbits. Pluto and Eris are dwarf planets

Terrestrial: mid size planets and the first true planets. these have managed to clear there orbits and may poses a tangible atmosphere. they could poses life. earth and mars are terrestrial planets.

Gas Giants: large gaseous planets with thick atmospheres mostly of hydrogen and dense cores. Jupiter and Saturn are both gas giants