[allmendream]

I understand your quotes quite fine. They explain that either is equally valid as a COORDINATE SYSTEM.

A truck is heading into New York City at 80 miles per hour, that is a coordinate system.

An equally valid coordinate system would have New York City moving towards the truck at 80 miles per hour.

Either is equally valid AS A COORDINATE SYSTEM.

But an internal combustion engine explains the FORCES necessary to propel the truck towards NYC at 80 mph.

There is no equivalent explanation that you have provided that would supply the FORCE necessary to move New York City at 80 mph.

WHAT FORCE COULD MOVE THE SUN AROUND THE EARTH WHILE LEAVING THE EARTH MOTIONLESS?

Your inability to answer amuses me to no end.

[ToGodBeTheGlory]

The answer is quite clear. The force in question is God.

[Ethan Clive Osgoode]

WHAT FORCE COULD MOVE THE SUN AROUND THE EARTH WHILE LEAVING THE EARTH MOTIONLESS?

Your all-caps spectacle is all very amusing of course, because while you revile the other poster, you yourself have said that science cannot prove that the earth goes around the sun. And, on top of that, according to you it cannot even be said that 'the earth goes around the sun' is true:

[allmendream] nothing in science is ever “proven”.

[ECO] Indeed, every astronomy book is, as you say, careful to point out that 'the earth goes around the sun' can never be proven.

[allmendream] it is still called the Heliocentric Theory, not the Heliocentric Truth

[GourmetDan]

"I understand your quotes quite fine. They explain that either is equally valid as a COORDINATE SYSTEM."

Um, under GR coordinate systems are physically indistinguishable.

That's why Hoyle said:

“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 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.... Today we cannot say that the Copernican theory is ‘right’ and the Ptolemaic theory ‘wrong’ in any meaningful physical sense.”

Hoyle, Fred. Nicolaus Copernicus. London: Heinemann Educational Books Ltd., 1973.

"WHAT FORCE COULD MOVE THE SUN AROUND THE EARTH WHILE LEAVING THE EARTH MOTIONLESS? Your inability to answer amuses me to no end."

You insistence on asking a question that is not relevant to the issue amuses me to no end.