Composite image of Mars (centre) and its two moons Phobos (right) and Deimos (left) captured on 17th August 1924. Phobos is the innermost and larger of the two Martian satellites. It orbits Mars in under 8 hours. Deimos is the outer moon, orbiting Mars in around 30 hours. Both Phobos and Deimos are thought to be asteroids captured by the gravity of Mars. The moons were discovered in 1877, by the American astronomer Asaph Hall. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Van Ravenswaay, Detlev |
Taille de l’image : | 3898 px × 2105 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |