A day on Uranus is about half a minute longer than previously thought, according to new research.
An analysis of 11 years of Hubble Space Telescope observations shows that Uranus' day lasts 17 hours, 14 minutes, and 52 seconds. That's 28 seconds longer than NASA's Voyager 2 spacecraft estimated when it passed Uranus in 1986. Researchers reported the updated estimate April 7 in the journal Nature Astronomy.
