Neptune sits more than a billion kilometres farther from the Sun, yet parts of Uranus’s atmosphere fall to minus 224 degrees Celsius and become colder — a reversal scientists associate with the strange planet releasing remarkably little heat from its own interior

Uranus reaches a lower atmospheric minimum than more distant Neptune, but two 2025 studies revised the old claim that Uranus releases no internal heat at all. The post Neptune sits more than a billion kilometres farther from the Sun, yet parts of Uranus’s atm…