Phases of the Moon - the Science behind it
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The phase and libration of the Moon for 2013 at hourly intervals, with music, titles and supplemental graphics.
Red and orange tinted Moon, as seen from Earth during a lunar eclipse, where the Earth comes between the Moon and Sun The Moon is the only natural satellite of the Earth , [ d ] [ 7 ] and the fifth largest satellite in the Solar System . It is the largest natural satellite of a planet in the Solar System relative to the size of its primary , [ e ] having 27% the diameter and 60% the density of Earth, resulting in 1 ⁄ 81 its mass .