
1) Impact crater on Mercury
Found on
https://www.crosswordclues.com/clue/polygnotus

PolygnotusPronunciation-needed (Πολύγνωτος) was an ancient Greek painter from the middle of the 5th century BC, son and pupil of Aglaophon. He was a native of Thasos, but was adopted by the Athenians, and admitted to their citizenship. He painted for them in the time of Cimon a picture of the taking of Troy on the walls of the Stoa Poiki...
Found on
http://en.wikipedia.org/wiki/Polygnotus
[crater] Polygnotus is a crater on Mercury. This basin has a central peak ring and is embayed with smooth plains material, which is very different in texture from the surrounding terrain. ...
Found on
http://en.wikipedia.org/wiki/Polygnotus_(crater)

painter famed for his large monumental wall paintings in a severely classical style, none of which is extant. He lived in Athens and eventually ... [3 related articles]
Found on
http://www.britannica.com/eb/a-z/p/90

(c. 500-c. 440 BC) 5th-century BC Greek painter. He is famous for developing the art of large-scale narrative painting, his most famous works being the Sack of Troy (Athens) and Ulysses in the Underworld (Delphi)....
Found on
http://www.encyclo.co.uk/local/20688
No exact match found.