Earth

About
Earth is the third planet from the sun, the homeworld of humanity. According to radiometric dating estimates and other evidence, the Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, which is Earth's only natural satellite. The Earth orbits around the Sun for 365.256 solar days, a period known as an Earth sidereal year. During this time, the Earth rotates about its axis 366.256 times. That is, a sidereal year has 366.256 sidereal days.