Formation of the Moon


The moon is the only natural satellite that orbited around the planet earth. The early attempts to explain the origin of the moon were initiated by Sir George Darwin. According to his theory, the earth and moon were single rotating bodies that rotated rapidly. Then, the whole mass became a dumbbell-shaped body, and eventually, it broke. This hypothesis also suggested that the material forming the moon was separated from the present-day Pacific Ocean.

However, the present scientists do not accept the dumbbell-shaped hypothesis. It is generally believed that the formation of the moon is an outcome of a giant impact i.e., explained in “the big splash hypothesis”. According to this theory, an object (Theia) size of one to three times mars collided with the earth after the formation of the earth. With this impact, a large part of the earth was blasted into space. This portion consisted of large particles (Disks of debris), that started orbiting around the earth. and eventually, debris accumulated and formed a major clump known as the present-day moon. This theory suggested that the moon formed about 4.44 billion years ago.