Craters on Pluto and Mars

Explanation: Examples of central floor pit craters on A) Mars and B) Pluto. Scale bars are approximately 12 miles (20 kilometers) across. The Mars image is from ESA’s High Resolution Stereo Camera and features a crater in the Thaumasia Planum region. The Pluto example shows an as yet unnamed crater in the dark terrain of Cthulu Regio.

Pluto

Image credit: ESA (A), NASA/JHUAPL/SwRI (B)