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The period of rotation (day) on Neptune varies by latitude, but the core rotation takes about 16.11 Earth hours. (16 hours, 6 minutes, 36 seconds) The atmospheric rotation appears faster near the poles (about 12 hours to rotate once) than at the equator (about 18.1 hours to make a complete rotation).

Neptune does not have the same type of solid surface found on Earth and the smaller planets. Under the thick hydrogen-helium atmosphere is a dense slush of water, ammonia, and methane, with only a small rocky Earth-sized core.

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13y ago

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