Messenger has been sending photos of the craters on Mercury. I'm sending along two photos. One is an image of the Firdousi crater. The second photo shows how a similar "crater" can be reproduced (more or less) using electric arcing techniques in a plasma laboratory.
In lumine tuo videbimus lumen.
8O Home-made 10” Dob / Home-made 4” refractor
EPs: Konig 32mm (1.25") / Zhumell WF 30mm (2") / Nagler 13mm T1 / Orion Sirius Plossls 25 & 10mm / Zhumell Plossl 9 mm / Meade MA 9mm