A ring-crossing is where Saturn’s rings seem ... around a planet at the same time as the planet itself forms. Irregular moons are thought to be small planets (planetesimals) that are captured ...

A ring-crossing is where Saturn’s rings seem ... around a planet at the same time as the planet itself forms. Irregular moons are thought to be small planets (planetesimals) that are captured ...

For example, ring particles — the tiny fragments of ... circular orbits close to the equator of their host planet; and irregular moons, which can be much smaller and have larger, more elliptical ...

A ring-crossing is where Saturn's rings seem ... The new moons are all irregular. One of Saturn's irregular moons, Phoebe. Phoebe was discovered in 1898 and was the first irregular moon of Saturn ...

Most of the rings have a prograde orbit, in the same direction as Saturn, but the outermost (the Phoebe ring) is thought to originate from Phoebe, the largest of Saturn's irregular moons—and ...

The moons that orbit Uranus are already known to have unusual characteristics: some are heavily cratered, others have ...

A ring-crossing is where Saturn’s rings seem to disappear ... Regular moons are formed around a planet at the same time as the planet itself forms. Irregular moons are thought to be small planets ...