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The Mercury-bound MESSENGER spacecraft captured several stunning images of Earth during a gravity assist swingby. This image was taken when MESSENGER was 34,692 miles, (55,831 kilometers), above Earth. The line dividing day and night cuts a swath through South America, with night about to fall on the western half of the continent. The large bright spot to the west of South America is the Sun's light scattering off ocean waves.
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