Prior to 2006, Pluto was the coldest planet because its position of the planet furthest from the sun explained its very low temperature. However, since 2006, Pluto is no longer considered to be a planet because specialists have realized that it is much smaller than we imagined, giving it the status of a dwarf planet.

Today, two planets can claim the title of "coldest planet in the solar system": Neptune and Uranus. To answer the question, one must ask whether we are talking about the coldest average temperature or the lowest temperature reached on a planet.

Neptune, being the eighth planet in our solar system and therefore the one furthest from the sun, has the coldest average temperature (around -214°C). On the other hand, Uranus being the 7th planet farthest from the sun, holds the record for the coldest temperature reached, with a record of -224°C.

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