The Icy Moons' Double Breath: JWST Unravels the Mystery of Uranus's Carbon Dioxide
Ever since Voyager 2 raced past Uranus in 1986, the planet's icy moons have kept a mystery: where does the carbon dioxide on their surfaces come from? The spectrometers of that era only hinted at the presence of CO₂, but couldn't say anything about its origin.