The coldest recorded temperature on Earth is minus 128.6 degrees Fahrenheit, or minus 89.2 degrees Celsius, but many other planets are regularly colder than this.
Temperatures on Mars, for example, range from a comfortable 70 F all the way to minus 220 F, according to the National Weather Service.
Jupiter is even colder, according to the NWS, with an average temperature around minus 238 F.
But even with such unimaginably frigid temperatures on its surface, Jupiter is not the coldest planet in our solar system.
What is the hottest planet? In our solar system, it’s not the one closest to the Sun.
What are the biggest planets? Trying to understanding the scale of our universe.
What is the coldest planet in our solar system?
The answer depends on how you define “coldest.”
Despite being closer to the sun than Neptune, Uranus boasts the coldest recorded planetary temperature in our solar system, with a record low of about minus 370 degrees Fahrenheit, or minus 224 degrees Celsius, according to University College London.
According to Wonderopolis, though, Neptune’s average temperature is colder than that of Uranus, so it’s hard to say one planet is truly “colder” than the other.
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What is the coldest known planet?
Exoplanet OGLE-2005-BLG-390L b is the coldest known planet, according to NASA, with an average temperature the same as Uranus’s record low, minus 370 degrees Fahrenheit, or minus 223.3 degrees Celsius. That’s only about 50 Kelvin.
According to NASA, this exoplanet is 21,526 lightyears from Earth, and its discovery was announced in the year 2005.