Orrery. An orrery is a model of the Solar System used to show the order of the planetary orbits around the Sun. Here,there are nine 'planets' (including Pluto,now classed as a dwarf planet),and the Earth has its Moon. Here,only a vague attempt at showing the relative sizes of the planets has been made. In most orreries,a mechanism allows the planets and moons to rotate in the correct ratios of their orbital periods | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 4206 px × 4206 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |