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The sunlight reflected from the earth's surface that illuminates part of the moon not directly lighted by the sun. Also called earthlight.


(ˈɜːθˌʃaɪn) or


(Astronomy) the ashen light reflected from the earth, which illuminates the new moon when it is not receiving light directly from the sun



the faint illumination of the part of the moon not illuminated by sunlight, as during a crescent phase, caused by the reflection of light from the earth.
clair de Terre
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References in periodicals archive ?
For a couple of nights after the new moon, it's also possible to see Earthshine on the surface of the moon.
Alson Wong An high-dynamic-range (HDR) composite reveals exquisite detail in the corona's complex array of streamers and the Moon's face aglow with earthshine.
You once again have an opportunity to see a very thin crescent Moon with Earthshine in a dark sky.
Look for dim, gray earthshine illuminating the crescent Moon's night parts--the beautiful "old Moon in the new Moon's arm's" effect.
Herschel also argued the case for active volcanism and topographic change on the lunar surface, observing in 1787 three glowing 'volcanoes' on the Moon's dark hemisphere--almost certainly the bright ray craters Aristarchus, Copernicus and Kepler, illuminated by earthshine.
Last week the sliver moon was like a giant silver scythe lying in the night sky brilliantly lit by the phenomenon of Earthshine when light from the sun reflects from our spinning planet onto the visible moon's surface.
Michael Sterzik, of the European Southern Observatory, said: "We used a trick called earthshine observation to look at the Earth.
The Earthshine project has measured changes in the earth's albedo up to about 9 watts/square meter--several times the total forcing of greenhouse gases.
Fellow Poles, Tides From Nebula have been enthralling audiences across mainland Europe since 2008 and they come to the UK on the back of their second album Earthshine.
Both Mather and Woody view earthshine as originating from a ~300 K blackbody source.
According to the scientists, the brightness of the reflected earthshine varied as the Earth rotated, revealing the difference between the intense mirror-like reflections of the ocean compared to the dimmer land.