Is the heliocentric model or the geocentric model correct?
A “model” is a mathematical tool used in setting up equations to determine future states of a system. It is possible to use either “models” and get accurate answers. For example, nautical astronomy — determining the position of a ship from sextant observations of stars — uses equations based on an immobile observer: The navigator is at the centre of the universe, the ocean moves under him in the opposite direction of his real movement, and everything in space is fixed on a sphere rotating around the observer. If the ship is going west at 15 knots, then the “navigator’s model” has the entire universe traveling east at 15 arc-minutes per hour. We know that this does not represent reality, but it works very well and one can easily find the position of the ship using this “model”. When calculating tide tables, we used a model where everything was immobile (including Earth not even spinning). We would calculated the height of the tidal bulge based on the Sun and the Moon being both immobi
The heliocentric model says the sun is the center and all the planets revolve around it. The geocentric model says that the Earth is the center and everything revolves around it. The heliocentric model is correct, the sun is the center of the solar system, all 8 planets and everything else in the solar system revolves around the sun.
