Story thread · 2 reports / 2 sources

The Red Planet Has a Purple Side

universetoday.com · 1hShare

Mars appears red because of iron oxides in the regolith. But it's not uniformly red. Different lighting conditions and different materials accumulated on the surface can make it appear purple, as in these images from Mars Express and its High-Resolution Stereo Camera.

First report: Purple swirls on the Red Planet — esa.int, 2d