Today I continue the section on Facts about the Solar System planets with the planet Earth.
Earth is the third planet in distance from the Sun. It has a sidereal year of 365.256 Earth days and sidereal day duration of 23 hours 56 minutes and 4 seconds. Earth's atmosphere is 78.08% nitrogen, 20.95% oxygen. The average temperature of the Earth's surface is 14.76 °C
Earth's radius is 6,371.8 Km, slightly larger than Venus
The image of Earth is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted"
Image of Saturn obtained from the public domain. J.T. Trauger (JPL), J.T. Clarke (Univ. of Michigan), the WFPC2 science team, and NASA, Public domain, via Wikimedia Commons