Permanently shadowed crater

A permanently shadowed crater, or permanently shadowed region (PSR), is a depression on a body in the Solar System within which lies a point that is always in darkness. As of 2019, there are 324 known permanently shadowed regions on the Moon. Such regions also exist on Mercury and Ceres.

This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.