[Dominic Harr]

Now Galileo and Copernicus advocated heliocentrism and I asked you what 'observed fact' you were talking about and what is the observation that proves it?

Wait, you're arguing with -- heliocentrism?

Nah, not really, right?

[GourmetDan]

"Now Galileo and Copernicus advocated heliocentrism and I asked you what 'observed fact' you were talking about and what is the observation that proves it?"

Wait, you're arguing with -- heliocentrism?

Nah, not really, right?

See how easily you move from 'observed fact' into belief? So easy even a cave man could do it.

The truth is that there is no 'observed fact' uniquely supporting heliocentrism and you are totally unaware of that fact. Ever understand what coordinate systems (CS) in Einsteinian relativity actually means?

What else do you accept as 'fact' when there is no factual basis thereof?