Unformatted text preview: When the Voyager spacecraft flew by Neptune in 1989, it found a large dark storm, called the Great Dark Spot (very original, yes?), that was about the size of Jupiter's Great Red Spot. However, recent Hubble Space Telescope photographs show that the Great Dark Spot seems to have dissipated. Uranus (left) , Neptune (right) , and Earth to the same scale. Methane gives Uranus and Neptune their blue color. Neptune's Great Dark Spot is seen in the center of the Neptune image. Uranus and Neptune both have a blue color. Instead of ammonia clouds, their clouds are made of frozen methane crystals because they are much colder than Jupiter and Saturn. The red and orange colors of sunlight are absorbed by the methane in their atmospheres while the blue colors are scattered back out, producing the blue color with a faint greenish tinge....
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- Fall '10
- Astronomy, Planet, Neptune, Great Dark Spot