__________________ Photo: "This
view shows the thin crescent Moon setting over ESO’s Paranal Observatory in
Chile. As well as the bright crescent the rest of the disc of the Moon can be
faintly seen. This phenomenon is called earthshine. It is due to sunlight
reflecting off the Earth and illuminating the lunar surface. By observing earthshine
astronomers can study the properties of light reflected from Earth as if it
were an exoplanet and search for signs of life. This picture was taken on 27
October 2011 and also records the planets Mercury and Venus." (European Southern Observatory) Credit:Babak Tafreshi at http://www.eso.org/public/images/eso1210a/ Courtesy of Wikimedia Commons -
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