Earth
Earth is the planet that is the third closest from the sun. The Earth is the only planet that can sustain life and also is the only planet with water on it. Earth is the third smallest, and fifth largest. Earth's day lasts 24 hours, and it's year lasts 365 days. The Earth orbits at a speed of 67,000 MPH. The Earth is 77% nitrogen, 21% oxygen, and 2% other constituents.