Full Idea
Anaxagoras was charged with impiety because he called the sun a lump of stone.
Gist of Idea
Anaxagoras was charged with impiety for calling the sun a lump of stone
Source
report of Anaxagoras (fragments/reports [c.460 BCE]) by Plutarch - 14: Superstition §9
Book Reference
Plutarch: 'Selected Essays and Dialogues', ed/tr. Russell,Donald [OUP 1993], p.9
A Reaction
The point is that he was supposed to say that the sun is a god.