Water on Mars, illustration

Numéro d’image : 12394553
Water on Mars, illustration
Water on Mars. Illustration comparing present-day Mars (left) with an ancient Mars that had a thicker atmosphere and liquid water. Mars formed around 4.6 billion years ago. The young planet would have had enough water to fill an ocean occupying almost half of the northern hemisphere, reaching depths greater than 1.6 kilometres. Currently, Mars is a rocky desert world with no surface water. The atmosphere is mostly carbon dioxide and Martian surface temperatures are well below freezing. Most of the water and atmosphere were lost to space, or locked up underground in deposits of ice.
Licence : Droits gérés
Crédit: Science Photo Library / NASA's Goddard Space Flight Center
Taille de l’image : 4328 px × 2434 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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