SDO's Double Eclipse (IMAGE)

NASA/Goddard Space Flight Center

SDO's Double Eclipse

Caption

You can tell Earth and the moon's shadows apart by their edges: Earth's is fuzzy, while the moon's is sharp and distinct. This is because Earth's atmosphere absorbs some of the sun's light, creating an ill-defined edge. On the other hand, the moon has no atmosphere, producing a crisp horizon.

Credit

NASA/SDO

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