Saturn is known as a planet with rings, but hardly the only one. As it turns out, rings around planets are not all that rare, and at least some planets in our solar system have them. Uranus is one of those worlds, and although its rings are so weak that they were not discovered until the late 1970s, scientists have shown great interest in them.
Well, a new observing campaign by scientists using Chiles Very A large telescope and a large millimeter / submillimeter array (ALMA) provide a unique view of the rings of Uranus.
The incredibly delicate instruments on the telescopes have allowed scientists to record thermal images of the planet. to get an idea of the temperature of his thin rings. Uranus is a ridiculously cold world, but his rings are actually a bit warmer than you could imagine. They are still very, very cold, but they still give off enough heat to be thermally imaginable.
So, how warm is "warm" when we talk about a planet like Uranus? The researchers say the rings are approximately 77 Kelvin based on the readings. If we convert that to Fahrenheit, cold 321
The most visible part of the rings in this picture is called the Epsilon Ring, and scientists are learning how different it is from the rings of other planets in our system, such as Saturn.  "We already know that the epsilon ring is a bit weird because we do not see the smaller things," said Edward Molter, lead author of the research, in a statement. "Something has swept away the smaller stuff, or it all comes together, we just do not know it, this is a step toward understanding their composition and whether all rings are from the same source material or different for each ring."  Source: UC Berkeley image by Edward Molter and Imke de Pater