Artist's impression of shepherd moons in Saturn's ring plane. The rings of Saturn are in reality thousands of concentric rings,like grooves on a gramophone record. They are made of billions of ice & rock particles ranging from a few centimetres to hundreds of metres across. Within the rings are larger rocks,small moonlets known as "shepherd" moons because their gravity & motion maintain the concentric nature of the ring system. Without these "shepherds",Saturn's rings would have lost their form millions of years ago. The shepherd moons were one of the discoveries of the Voyager spacecraft mission | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Baum, Julian |
Taille de l’image : | 3543 px × 2661 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |