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Neptune is the furthest away from the Sun, but it has an internal heat source.

So, Uranus may be the coldest. Their surface temperatures are certainly very similar.

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11y ago
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13y ago

Neptune is really the coldest Planet. Pluto is farther away and even colder, but, Pluto is a Dwarf Planet, it's not considered a real planet anymore.

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12y ago

Pluto

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Q: What planet is the coldest and why is it the coldest?
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