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Neptune

Composition
Neptune’s atmosphere is composed primarily of hydrogen and helium, along with traces of hydrocarbons and possibly nitrogen. It also contains a higher proportion of “ices” such as water, ammonia and methane. Astronomers sometimes categorize Uranus and Neptune as “ice giants” in order to emphasize these distinctions. The interior of Neptune is primarily composed of ices and rock. Traces of methane in the outermost regions in part account for the planet’s blue appearance.

Neptune’s atmosphere is notable for its active and visible weather patterns. These weather patterns are driven by the strongest sustained winds of any planet in the Solar System. Because of its great distance from the Sun, Neptune’s outer atmosphere is one of the coldest places in the Solar System.

Size
Diameter: 30,760 miles

Rotation
Period of Time: 17.24 hours

Distance from Sun
Minimum: 2.77 billion miles
Maximum: 2.82 billion miles

Bonus Video

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