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ganon
2011-May-18, 12:45 PM
Hello!

Let's imagine there is a observer on the surface of the Sun,
would he see a difference of Earth's apparent motion in the case where the Universe is absolutely geocentrical and in the case where it's absolutely heliocentrical?

The spinning motion of the Sun is considered while variation of the ecliptic isn't, for the sake of simplicity.

WayneFrancis
2011-May-18, 01:00 PM
? what ?
I'd go down the whole "its a coordinate choice" but I hate that answer because its really an advanced concept that goes way beyond what most people are asking.

We have an observer near the sun. It shows that the Earth orbits the sun. I'm really not getting your question...can you expand on what you are asking please?

pzkpfw
2011-May-18, 08:17 PM
... would he see a difference of Earth's apparent motion in the case where the Universe is absolutely geocentrical and in the case where it's absolutely heliocentrical? ...

My understanding is that the apparent motion of the Earth would be the same either way, but from the geocentric point of view the motions of the other planets is then "weird" and hard to explain.