Who helped establish heliocentrism, the idea that the Earth orbits the Sun?

Note to UK politicians, it's not pronounced " copper knickers ". Just saying.

Troglodyke, wow, how you get from astronomy to politics is amazing in itself. I really dislike using my trilogy game as a political platform.

OMG. Were it not for watching Celebrity Jeopardy today, I would not have gotten this long forgotten fact.

Troglodyke, oh, come on! You know he doesn't do his own hair! :-D