Compared to most of the natural satellites of the solar system, Moon is a large body indeed. Scientists say that understanding the way in which Moon was formed and evolved (gradually changed over a period
of time) helps us to understand the history of the solar system including that of our own Earth.
Today, many scientists agree that Moon came into existence about four and a half billion years ago. They believe that a large Mars sized body came and hit the Earth at that time. Because of that colossal collision, the Earth lost its outer portions. And, the colliding body was destroyed. Pieces generated by that gigantic collision started circling the Earth. Slowly, they came together and formed the Moon, say the astronomers....more
Man On The Moon
On October 4, 1957, Sputnik 1, the world's first artificial satellite, was launched and started circling the Earth. Moon, which had circled the Earth (perhaps alone) for billions of years, acquired a tiny companion.
With it, Space Age began. So was the intense competition between the United States and the former Soviet Union in exploring space more..
Many countries and international organizations started spacecraft programs to explore the Moon. They include the European Space Agency (ESA), Japan, China, the United States and Russia. Ex : Apollo 11 , SMART-1 , SELENE , Chang'e-1 , Chandrayaan-1 , LCROSS more...