New pictures of the surface of Mars, taken by the Mars Reconnaissance Orbiter. They’re interesting — what looks like water eroded canyons, very familiar, and exotically odd things like cones of snow produced by windblown eruptions of geysers.
One thing I wish they’d do, though, is either tell us where the light source was, or be consistent in their orientation — I learned early on that you need to lay out photomicrographs of DIC cell fields so it looks they are lit from the top of the picture, or otherwise you get ambiguous shadows that can make cells look like craters rather than plump bumps. It’s the same problem with these photos — half of them, I can’t tell whether I’m looking at a canyon or a hill, and worse, they flip between the two states as I’m looking at them. Don’t people using telescopes have conventions to accommodate human visual perception quirks, just like us people who use microscopes?