In the night when we walk alone, there is always a companion high in the sky walking along with us showing the light in the dark - The moon! In this busy, where people are always occupied with some thought and work often forget to have a look at the moon. It’s in the sky looking at us with a white face. Each one on the earth have a strong inner feeling that it was created for one’s self as they see it everywhere they go. It will seem like the moon is walking with us. But how many of us have imagined a life without the moon? Many theories have been put forward to explain the origin of the moon. One of which says that the moon was formed as when the earth formed from the debris of the sun. The other prediction is that the moon had formed somewhere else in the solar system and has been captured into the earth’s orbit. These theories failed as they had insufficient proofs and it did not give answer to many questions of doubts. Finally a hypothesis was framed which says that the moon was formed from the earth itself. Some 4.5 billion years ago, as earth was growing, a mars like body named Theia, hit the earth and the debris filled with rocks went around the earth and together they formed the moon. Whatever maybe its origin, we have been gifted with an awesome white celestial companion up in the sky!!