Pocket Mars Reconnaissance Orbiter

The images we show on the Planet Four projects come from Mars Reconnaissance Orbiter. Although MRO won’t be coming back to Earth, you can have your very own pocket-sized MRO.

If you’ve got a 3-D printer, you can try your hand at printing out your own mini-MRO to keep you company while classifying images on Planet Four, Planet Four: Terrains, or Plant Four: Ridges.