Martian volcanoes
Martian volcanoes This widefield image of Mars' Tharsis volcanic region was captured on June 29, 2014 by ESA's Mars Express orbiter. Olympus Mons is at the center. Across top-center from left to right are Ascraeus Mons, Pavonis Mons, and Arsia Mons. Noctis Labyrinthus can be seen near the horizon at top left. ESA / DLR / FU Berlin / Justin Cowart

This image uses low resolution blue, green, and IR color data (with green and IR blended 50-50 to produce a synthetic red image) overlaid on a high-resolution clear filter image.