Transcription: Zdenek Horsky The Earth-lit Moon You have probably seen this effect. The lunar crescent is brilliantly lit by the Sun, but rather surprisingly it is possible to see the rest of the surface also, shining quite noticeably against the sky background. This effect is termed the Earthshine. In past ages many people believed that celestial bodies were made up of clear aether, quite different from the dark terrestrial elements. Even in the 16th century some astronomers regarded stars as being due to thicker parts of the celestial sphere. The stars and also the moon were made of crystal. You do not bel ...
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