Look closely at the darkened portion of the moon . It 's illuminated by earthshine .
请观察月亮上变暗的部分，它被地光照耀着。
Sciencedaily ( apr. 8 , 2009 ) - researchers from the university of melbourne and princeton university have shown for the first time that the difference in reflection of light from the earth 's land masses and oceans can be seen on the dark side of the moon , a phenomenon known as earthshine .
The plane of the ecliptic is illustrated in this clementine star tracker camera image which reveals ( from right to left ) the moon lit by earthshine , the sun 's corona rising over the moon 's dark limb and the planets saturn , mars and mercury .
Those who 've seen the ashen light of venus report it looks a lot like the reflected " earthshine " that sometimes casts a dull glow on the moon , but not even that bright .
