C'est exact, ce sont des images prises par le Rover
Opportunity.
L'image du jour de la NASA est une photo de la surface martienne, y montrant l'arrivée du printemps (qui se manifeste par la fonte de ses glaces de CO2) :
Citer:
Spring has sprung on Mars, bringing with it the disappearance of carbon dioxide ice (dry ice) that covers the north polar sand dunes. In spring, the sublimation of the ice (going directly from ice to gas) causes a host of uniquely Martian phenomena.
In this image streaks of dark basaltic sand have been carried from below the ice layer to form fan-shaped deposits on top of the seasonal ice. The similarity in the directions of the fans suggests that they formed at the same time, when the wind direction and speed was the same. They often form along the boundary between the dune and the surface below.
Image Credit: NASA/JPL-Caltech/University of Arizona
Nasa.gov
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Sage à ses heures, idiot le reste du temps.
Horaire inconnu.