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 ...

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 ...

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

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 ...

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 ...

These are called "irregular moons" because they aren't neatly spherical like our moon. But they were born in dramatic circumstances. The little moons are grouped cliquishly together, suggesting ...