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Dan, your penchant for semantic argument amazes me. While it is strictly true that the Sun is not the exact center of either the Universe, Galaxy, or Solar System, and that Einstein's CS system means that (In the words of Hoyle):

"The relation of the two pictures [geocentricity and heliocentricity] is reduced to a mere coordinate transformation and it is the main tenet of the Einstein's theory that any two ways of looking at the world which are related to each other by a coordinate transformation are entirely equivalent from a physical point of view."

There is a very simple 'observed fact' which supports Heliocentrism, namely, watching the movements of planets in relation to the sun and the sky.

Heliocentrism is the view that the earth orbits the sun and not vice versa, regardless of where the true center of mass for the system lies, or what fancy physics equations can do when you reverse the order.

Semantics are for wimps.

"There is a very simple 'observed fact' which supports Heliocentrism, namely, watching the movements of planets in relation to the sun and the sky."

Sorry bud. All that proves is that the planets orbit the sun. Nothing more.

"Semantics are for wimps"

So is insistence on belief over observed facts. The least you could do is admit that there are no such 'observed facts' rather than trying to pretend the argument is over semantics.

Einstein was bright enough to realize that and so am I. What's up w/ you?

"While it is strictly true that the Sun is not the exact center of either the Universe, Galaxy, or Solar System, and that Einstein's CS system means that (In the words of Hoyle):

"The relation of the two pictures [geocentricity and heliocentricity] is reduced to a mere coordinate transformation and it is the main tenet of the Einstein's theory that any two ways of looking at the world which are related to each other by a coordinate transformation are entirely equivalent from a physical point of view."

First of all, you misrepresent me if you suggest that I claim that the sun was the exact center of the Universe, Galaxy or Solar System.

Then, you acknowledge that both Einstein and Hoyle recognize that there are no 'observed facts' that uniquely support heliocentism... but you choose to believe it anyway.

That's fine. You're certainly free to do that. Just don't criticize me if I choose an equal and opposite coordinate transformation than the one you have chosen.

Comprehender?