| Above view of a magnetic compass the needle always points north and south because of the earth's magnetic field | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Dorling Kindersley / UIG |
| Bildgröße: | 4068 px × 4296 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |