Using the classification based on size, Earth is one of the small planets, along with Mercury, Venus , Mars and Pluto . The small planets all have diameters less than 13000 kilometers. Jupiter , Saturn , Uranus and Neptune are known as the giant planets or sometimes the gas giants. These planets have diameters greater than 48000 kilometers.
Earth is the third planet from the Sun, located in between Venus and Mars .
The orbit, or path it follows around the Sun is nearly a perfect circle. The closest Earth comes to the Sun is a little over 146 million kilometers. The average distance of the Earth from the Sun is about 150 million kilometers. Earth is the only planet that does not have a name from either Greek or Roman mythology. The Earth takes 365.25 days to revolve around the Sun.