The Subtle Glow of Earthshine
<p>Have you ever looked up at the night sky to behold the beauty of a crescent Moon and observed the faintly lit part of the rest of the surface of the Moon?</p>
<p>Well, <strong>that is due to the effect of</strong> <strong>Earthshine</strong>. It happens when light from the Sun is reflected off to the surface of the Moon from Earth and seen by us when those rays bounce off the Moon. About thirty percent of the sunlight that falls off the Earth is reflected back into space, and a portion of it strikes the lunar disc to form a hazy glow on the darker side. That radiance of light is reflected twice, that’s why it is very faint but still noteworthy.</p>
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