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Aurora lights on Uranus helped NASA’s Hubble Space Telescope measure the planet’s interior rotation rate, changing what astronomers know about how long a day is on the cold and windy world.

In the vastness of space, even the smallest discoveries can change our understanding, and Uranus has revealed a new secret.

If you've been wondering how long the day on Uranus is, you probably need to get out more. But if you have, you'll be ...