Uranus's Outermost Rings Are Made of Two Different Things
SMRTR summary
The James Webb Space Telescope has revealed that Uranus's two outermost rings are made of completely different materials — one contains rocky, carbon-rich dust, while the other is made of tiny water ice grains. The ice-filled outer ring surrounds a small moon called Mab, raising the question of why Mab is icy when other nearby moons are not. Answering that question will likely require sending a spacecraft to Uranus.
SMRTR provides this summary for quick context. The original article belongs to Hacker News.
Read the original article