Category : Books-Non-Fiction

Sub Category : Biography

Earth has a twin planet named Theia. Earth is the only planet that is not named after a god it was named after erda meaning soil which os not a god name. The Earth is 4 billion years old. The Earth has the greatest densit among all the in our solar system average density is 5.52.gm/cc. 70% of the Earth's surface is under water . Earth is th only known planet that supports life. Mount Everest is the highest point found on Earth it is 8.8 km in height. The Earth has a very powerful magnetic field. The distance from the sun to the Earth is calculated as 1 au or one Astrononmical unit. 1au equals to 150 millons. The Earth's interior has four diffrent layers the crust , the mantle , The outer core and the inner core.