Planetary ring

Planetary rings were rings orbiting around a planet.

Sol System planetary rings
The rings of Saturn were actually disintegrators implemented by Chris Cwej on command of his Superiors, to prevent the Democratic Saturnian Entanglement from unravelling the secrets of the Linear Universe. (PROSE: A Bright White Crack) Rudy Zoom claimed he was the first man to cycle the rings of Saturn. (COMIC: The Eye of Torment)

Other planetary rings
The rings around the planet Keetol were formed of Time Lord vessels destroyed in the Last Great Time War. As a result of the TARDIS engine debris, passing through Keetol's rings caused localised temporal shift. (AUDIO: The Heavenly Paradigm)

During the war between the All of Us and the People, fought across fifteen planets, three planetary rings were destroyed. (PROSE: The Also People)