Wiktionary
n. (context astronomy English) a ring of dust and small particles that orbits a planet (such as Saturn) as a flat disc; gaps in the ring are due to the presence of shepherd moons
Usage examples of "planetary ring".
Not surprising this close to a planetary ring system, especially one with life in it.
The screen cleared to the Kosmik emblem, the torch of knowledge within a planetary ring.
This one was off-white, like a miniature planetary ring seen from a distance.
This is normally a reliable procedure, except when the region is crowded with a confusing number of objects, such as the particles of a planetary ring system.
The other half was aimed at what remained of Coruscant's short-lived planetary ring.
Marglot was developing its own planetary ring, a disk of hot ejecta expelled by violent vulcanism.
A small light between the ninth and tenth planetary ring represented Polaris.
Rogues would accompany them as far as the Lavisar system's outermost planetary ring, and would wait there.
Up close it looked like planetary ring systems Ravna had known all her life.
I was looking out over Yumfla's night sky and up at the brilliant curved planetary ring stretching up and out from the horizon.
A dazzling burnt orange planetary ring arced across the sky behind it.