Martian mineral sphere. Image from the Mars exploration rover Opportunity of an anomalous spherical ball found in a rock that has been named Robert E. The diameter of the ball is about four millimetres and it may be similar in composition to the haemetite (iron ore) balls found in the surrounding area and believed to be formed from water deposits | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / NASA |
Taille de l’image : | 2952 px × 2959 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |