Mars Also Have Blue Section

We know that Mars identic with red planet. But not all part of Mars was red when it was get image. Mars Reconaissance Orbiter NASA show that there is the part of that planet coloured blue like earth.

The result of photo that publicized at New Scientist was the sand dune at Rabe Crater, region that have diameter 100kilometer at plateu at south of Mars. That region aptly look blue like earth sea from the atmosphere.

The question is why the sand bar parth have dark colour than the other? One of the possibility is the sand on the basa of the crater was not the local sand, but the sand from other place that ambushed because the topografy of that place. There is no explenation why that region have blue colour.

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