There's still a lot we don't know about planetary rings.

Saturn is best known for its planetary rings which are easy to see with a telescope.

The long arc of a planetary ring curved away into the stars.

This is interesting: The station was actually positioned directly above a planetary ring system.

The moon will one day either break up into a planetary ring or hit Uranus.

They were, he supposed, like planetary rings that had been unwound.

"I'm afraid it's the price one must pay to learn about things such as moons and planetary rings."

Over the next weeks, she performed that operation eight more times, casting each of the planetary rings.

He is the discoverer of five moons and three planetary rings.

Saturn is probably best known for the system of planetary rings that makes it visually unique.

This one was off-white, like a miniature planetary ring seen from a distance.

Most planetary rings were only a kilometer or two thick, but I didn't want to take chances here.

Neptune has a planetary ring system, though one much less substantial than that of Saturn.

It also possesses three non-aligned planetary rings of ice crystals.

Surrounding Jupiter is a faint planetary ring system and a powerful magnetosphere.

Jupiter also has a thin planetary ring system.

Shepherd satellites are moons that orbit within, or just beyond, a planet's planetary ring.

Instead, the age of these planetary rings is probably some hundreds of millions of years.

The four gas giants are also orbited by planetary rings of varying size and complexity.

Proto-planets in the process of formation and planetary rings may look like that, but the Sun's asteroid belt does not.

Among his contributions in astronomy was his explanation of Saturn's planetary rings.

-The point is that these planetary rings aren't unusual.

George turned toward the bow again, looking at the whirling planetary rings and the blazing little yellow-pink sun beyond them.

This table summarizes the properties of the planetary ring system of Uranus.

His research area is in planetary sciences, with a focus on physical studies of satellite surfaces and planetary rings.