Orbital phases demonstration. Polystyrene ball resting on circular foam board and circling an electric light to demonstrate the orbital phases of planets. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / DK IMAGES |
Taille de l’image : | 3480 px × 2813 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |