Earth, our home, is the third planet from the sun. It's the only planet known to have an atmosphere containing free oxygen, oceans of water on its surface and, of course, life. Earth is the fifth largest of the planets in the solar system. Earh is 92,239,728 km away from sun, this number always changes, but it is really warm or cold in some countries, on Earth, you can see a lot of different people, different nationalities, races, ethnical groups.