Neptune on Triton's Horizon

Original NASA description: This composite illustration is of the planet Neptune, as seen from its moon Triton. Neptune's south pole is to the left; clearly visible in the planets' southern hemisphere is a Great Dark Spot, a large anti-cyclonic storm system. This three-dimensional view was created using images from the Voyager spacecraft.

Source: http://www.nasa.gov/multimedia/imagegallery/image_feature_552.html

This file has an extracted image: PIA00344 Neptune on Triton's Horizon.jpg.

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