Neptune

> Neptune, with its beautiful blue atmosphere, was the last of the planets visited by the Voyager spacecraft. Neptune is only slightly smaller than Uranus, and it appears to be similar to its neighbor in its composition. Both planets, called the twins of the outer solar system, are thought to have large cores of water ice and rock surrounded by thick atmospheres of hydrogen, helium, and minor methane.

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[] en.wikipedia.org/wiki/**Neptune**
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