1) Chemist 2) Joroslav heyrovsky 
[crater] This is a circular crater formation with an interior that is shaped like a bowl. The inner walls are simple in structure, and slope straight town to the small interior floor at the midpoint. The crater interior has a generally higher albedo than its surroundings, giving it a somewhat brighter appearance. ...
[n] - Czechoslovakian chemist who developed polarography (1890-1967)