A South Polar Pit or an Impact Crater on Mars?
Mars South Pole Terrain
UA/NASA
We see many shallow pits in the bright residual cap of carbon dioxide ice (also called “Swiss cheese terrain”).
There is also a deeper, circular formation that penetrates through the ice and dust. This might be an impact crater or it could be a collapse pit.
It is late summer in the Southern hemisphere, so the Sun is low in the sky and subtle topography is accentuated in orbital images.
