Regarding satellites and spacecraft, in the geocentric model it fits perfectly well because of space rotating around the earth. There are all kinds of scientific discourses out there by geocentrists on this. You can't use that to prove either the geo or helio position.
Lynnie,
I was not talking about satellites or spacecraft in orbit around Earth, or how we see them from Earth. I was talking about deep space spacecraft, launched at essentially a strait trajectory,
and how they view Earth from deep space.
Toasty is right, if we could get outside the solar system, we could observe whether or not Earth is in motion around the Sun. Although this has never been done with a video camera and visible light, it has been done, and is being done all the time, with radio wave signals from satellites such as Voyager 1 or Cassini.
I drew two pictures to help explain this.
Deep space satellites communicate with Earth via radio signals. These signals are waves, and thus, we can measure the length of the wave (which the satellites do constantly). If the Earth was in motion, we could measure this motion based on the changing length of the waves. This is called
Doppler Shift. As it turns out, Earth is in motion, and we do measure a change in the wave length as the Earth orbits the Sun.
If however, all of space revolved around earth, we would never detect a change in wave length from a satellite. As the picture below illustrates.
Earth's motion is an observable, provable fact.