
1) Russian surname
Found on
https://www.crosswordclues.com/clue/timiryazev
[crater] This is a circular crater formation with a slightly eroded outer rim and interior, and an interior floor that is about half the diameter of the crater. No craters of note lie across the crater edges or insides, although the rim is slightly damaged along the southern face. The interior is relatively featureless, with only some sligh...
Found on
http://en.wikipedia.org/wiki/Timiryazev_(crater)
No exact match found.