Astro Physics Question:

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.