A mysterious ring invisible at all wavelengths except radio could be a trace of a dramatically unstable star shedding its ...

Rings and rainbows. A team of scientists claim they’ve uncovered a thin ring of light called a photon ring around the first black hole to have its picture taken, the supermassive black hole in ...

The unique two thin rings around the Centaur Chariklo could be shaped by an even smaller satellite. Chariklo is a Centaur, which are small bodies similar to asteroids in size but to comets in ...