Bryan J. Holler

Using the most powerful space telescope, James Webb, astronomers peeked into the cosmic dressing room and saw how the rings of asteroid Chariklo are changing.

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.