This image of Neptune was taken by Voyager 2 in 1989. A prominent cloud feature, dubbed the great dark spot, can be seen toward the center of the image. It is believed to be a storm similar to the great red spot on Jupiter.
Neptune's Moon Triton
This color mosaic of Neptune's large moon, Triton, was taken in 1989 by Voyager 2 during its flyby of the Neptune system. Triton has the coldest surface known in the Solar System, about 391 degrees below zero.
Sun in H-Alpha
the Sun as seen in hydrogen-alpha light. H-alpha is a narrow wavelength of red light that is emitted and absorbed by hydrogen. Many more details can be seen in the Sun's surface using an H-alpha light filter.
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