The New Moon in the Old Moon s Arms . ... Credit Copyright: M. Taha Ghouchkanlu Explanation: Also known as the Moon's ashen glow, Earthshine is Earthlight illuminating the Moon's night side. ... The darker earthlit disk is in the arms of a bright sunlit crescent. ... When the Moon appears in Earth's sky as a slender crescent, a dazzlingly bright, nearly full Earth would be seen from the lunar surface . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...