Structure of comet
Numéro d’image : 11883432
| Comet. Illustration depicting the structure of a comet. Comets are a loose aggregate of ice and dust,often referred to as a 'dirty snowball',probably surrounding a small rocky core. They have extended orbits,and develop their characteristic tails when they make a close approach to the Sun. The heat from the Sun causes the ice to evaporate or sublimate,creating jets of gas on the sunward side (left). This blasts more ice and dust from the comet,and the solar wind and radiation pressure draws this material out to form the visible tail. Comets are thought to originate either in the Kuiper Belt beyond Neptune,or from the Oort Cloud beyond the outer solar system | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Garlick, Mark |
| Taille de l’image : | 2830 px × 3780 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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