Have you ever gazed up at the night sky and caught your breath at the sight of a glowing ring encircling the moon? It feels .

The innermost planets straddle nighttime, with Mercury in the evening and the greatest western elongation of Venus in the ...

What is a moon? What is a star ... the others are elliptical, irregular and peculiar. Elliptical galaxies would be better called spheroidal; they can be spherical but are more commonly elongated ...

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 ...

Astronomers are now wondering, though, how this abundance of moons emerged in the first place. Regular vs. Irregular Moons Although Saturn boasts an impressive amount of moons, they aren’t quite like ...

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 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 ...

A ring-plane crossing happens when Saturn ... They tend to have circular orbits close to the planet’s equator. Irregular moons are thought to be small planetary objects captured by a planet ...

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