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What’s the coldest planet in the solar system? What about in the known universe?

Jacob Livesay, USA TODAYComments Off on What’s the coldest planet in the solar system? What about in the known universe?

In the known universe, the coldest discovered planet is an exoplanet 21,526 lightyears from Earth. Here's how cold it gets.

     
Jacob Livesay, USA TODAY
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