What is the moon

• only natural satellite of the earth.

• Early theory:-

• In 1838, Sir George Darwin suggested that initially, the earth and the moon formed a single rapidly rotating body.

• The whole mass became a dumb-bell-shaped body and eventually it broke.

• It was also suggested that the material forming the moon was separated from what we have at present the depression occupied by the Pacific Ocean.

• Giant impact’ “the big splat Theory :-

• A body of the size of one to three times that of mars collided into the earth sometime shortly after the earth was formed. It blasted a large part of the earth into space.

• This portion of blasted material then continued to orbit the earth and eventually formed into the present moon about 4.44 billion years ago.