Geocentric vs heliocentric model evidence

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SUMMARY

The discussion centers on evaluating evidence supporting the heliocentric model of the solar system versus the geocentric model. Key points include the phases of the moon, seasons, analemma of the sun, and solar and lunar eclipses, which can all be interpreted through both models. However, the mass of the sun compared to the Earth and the necessity of accounting for Earth's position in space probes provide stronger evidence for heliocentrism. The conversation highlights the complexity of visualizing the analemma in a geocentric framework, emphasizing the challenges of reconciling observations with theoretical models.

PREREQUISITES
  • Understanding of heliocentric and geocentric models
  • Basic knowledge of celestial mechanics
  • Familiarity with the concept of analemma
  • Awareness of gravitational laws and their implications
NEXT STEPS
  • Research the mathematical derivation of the analemma in heliocentric coordinates
  • Study the historical context of the geocentric model and its observations
  • Examine the role of gravity in celestial mechanics and its impact on planetary motion
  • Explore the evidence gathered from space probes regarding Earth's orbit
USEFUL FOR

Astronomy students, educators, and anyone interested in the historical and scientific debate between heliocentric and geocentric models of the solar system.

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Homework Statement


I wasn't sure where the most appropriate place to post this question is. But anyway.

Which of these, if any, can be used as evidence that the Earth revolves around the sun.
1. The phases of the moon
2. The seasons
3. analemma of the sun
4. solar and lunar eclipses
5. the sun is more massive than the Earth
6. because we have observed it from space with probes

I know there is other evidence, but I'm trying to see if any of these also make sense and I should add them to the list. I think 1-4 can be explained using the geocentric model too. Laws of gravitation I guess would make 5 an okay answer. I'm not sure if we really have "observed" the Earth going around the Sun.

Thoughts?

Homework Equations

The Attempt at a Solution

 
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5 plus gravity is a very strong argument.
Puchinita5 said:
I'm not sure if we really have "observed" the Earth going around the Sun.
Every space probe far away from Earth has to take the current position of Earth into account to communicate with Earth. And that position is correct in one model only.
Puchinita5 said:
I'm not sure if we really have "observed" the Earth going around the Sun.
Of course we have.
 
okay cool, I guess I was taking the word "observe" too seriously... The first 4 can be explained somehow in a geocentric model right? I figure it must because these were all things observed back then and they seemed content with the geocentric model despite these observations. The analemma one is really confusing me, I just can't visualize in my head if you could get an analemma in a geocentric system?
 
Well, technically you can always choose geocentric coordinates. It just leads to really weird physics once you realize the (other) planets have elliptic orbits around the sun.
 

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