Skin
This looks, to me, like a close-up of human skin. It's not. It's a photo of sand dunes on the surface of Mars, taken by the Mars Reconnaissance Orbiter. So you could say it's skin, just the skin of a planet instead of a person. Regardless, it's gorgeous.
Thanks, yet again, to Bad Astronomy for the pic.

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By Jeff Wood · Launched 4 years ago
Award-winning, non-fiction writing about reading, writing, art, family, love, astronomy, orbital mechanics, and life. Long form stories are featured along the links at the top.