| > Hence I feel heliocentrism is simply an observable fact. It isn't. You can easily define a coordinate system for the universe in which the earth is the center. Heliocentrism just makes some approximate computations easier because the sun is so heavy. Thus in heliocentrism, the orbits of the planets are approximately ellipses (near-circles) around the sun, while in a geocentric model, the orbits have more complicated shapes. Nevertheless (to explicare "approximate" even in the Newtonian gravity model (i.e. not Einsteinian gravity)) be aware that even in the heliocentric coordinate system the earth (and the other planets) don't move along an elliptical (near-circular) orbit around the sun, but both the sun and the planet move around a common center which is near to the sun. > There is no sane way to put the earth in the center once you do that. [...] Hence I feel heliocentrism is simply an observable fact. It's not a mathematical convenience. It's a fact you can see with a camera. The relativism or perspective argument is irrelevant because as we established you have to be very unreasonable to describe a picture of a huge ass sun that hardly moves with small planets zooming around it as earth centric. Modern physics really is about that there is no preferred coordinate system: this manifests itself in the fact that conserved quantities can be derived via Noether's theorem from such symmetries in the natural laws. There is just a choice of a coordinate system which in our solar system makes computations easier. |
Within the sun, with one exception.