The earth is the third planet from our sun in our solar system (Mercury is the closest, then Venus, then Earth), and it is where humans live. The earth is approximately 93 million miles (150 million kilometers) from the sun. It orbits around the sun every 365 days, 5 hours, 48 minutes, 46 seconds. The earth has an axial tilt of 23 degrees with a rotational period of 23.5 minutes. Its mass is approximately 1.317 x 1025 pounds (5.97 x 1024 killograms). The earth’s diameter is approximately 7,900 miles (12,700 km). Earth is often used as a term for dirt.