The Moon:- It is the only natural satellite if the earth

revolving round the earth. It s one revolution round the

earth tales approximately one lunar month(of 29 ? days).

This period varies by 13 hours sue the eccentricities of the

orbits of the moon and earth. Unlike the sun and the stars,

its shinning is seen due to the reflected light which comes

from the sun. The diameter if the moon is lesser than one

quarter that of the earth. Compared with the sun the moon is

quite near to the earth(only 240,000 miles away). The

diameter of the moon on several calculations found to be

2160 miles.