The average distance from the Moon to the Earth is 384,403 kilometers (238,857 miles). The Moon's diameter is 3,476 kilometers (2,160 miles), which is 25% of Earth's diameter.

At full moon the earth is between the moon and the sun; at new moon the moon is between the sun and the earth.

The first photograph of the Moon was taken in 1840 by J.W. Draper using a 12 cm reflector with an exposure time of 20 minutes.

The Moslem calendar today is still based on the Lunar calendar, where the average month has 29.5 days.

Only about 59 percent of the Moon's surface is visible to us here on earth.

The Moon's heavily cratered surface is the result of intense thumping by space rocks between 4.1 billion and 3.8 billion years ago.

The Blue Moon occurs once every 2.7 years.

The largest Moon crater is Bailly, its diameter is 295 km.