Phenomenon
Planetary Ring
A disc of dust and ice circling a planet.
Flat rings of ice, rock and dust orbiting a planet. All four giant planets have them, with Saturn's being the most spectacular.
Overview
Flat rings of ice, rock and dust orbiting a planet. All four giant planets have them, with Saturn's being the most spectacular.
See also
Gap in Disc
A clearing in a protoplanetary disc carved by a planet.
Solar Eclipse
When the Moon stands between Earth and Sun.
Lunar Eclipse
When Earth's shadow falls on the Moon.
Meteor Showers
Cosmic dust burning in our atmosphere.
Aurora (Northern/Southern Lights)
Solar wind painting the upper atmosphere.
Supernova
The catastrophic death of a massive star.