Birth of Moon

                             

The Earth over its 4.5 billion year history has been pummeled by asteroids eroded by wind and rain, covered over with flowing lava, wrinkled and gaouged by shifts in its crust. Most traces of its distant past have long since been destroyed. But there is a place where clues to the early history of our planet are still largely intact. Scientists have been reconstructing its history by scouring its surface, mapping its mountains and craters and probing its interior regions. The Moon orbits earth at an average distance of 384,400 kilometers. Its relatively small, with less than 1 percent the surface area, 2 percent the volume and 1 percent the mass of Earth. With no atmosphere their temperature ranges from -233 degree celsius at night to 123 degree celsius during the day.