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< Esato Forum Index > General discussions > Non mobile discussion > $1000 if you can prove the Earth revolves around the Sun! Bookmark topic

Why the moon or our satellites doesn't "fall" back to earth ? Because they have a certain speed that produce a force (centripetal) exactly the same, but in another direction, as the force of gravity from the earth. This is the same for earth vs. sun.

This is basic physics

[ This Message was edited by: Jim on 2006-02-10 19:20 ]
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Posted: 2006-02-10 20:19:21
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@Jim

It is indeed, but how do you know that the sun isn't revolving around the earth rather than the other way round?

In fact, if you take Einstein's theory of special relativity into account, you could even argue that it is!
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Posted: 2006-02-10 20:42:31
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Oh from this point my argument would be that mercury and venus wouldn't be so hot. If earth would be the center that means that the sun has an orbit and therefore mercury and venus would have a period of extreme cold and hot, same for the other planet's then, which isn't the case.
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Posted: 2006-02-10 21:01:30
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...assuming that our interpretation of the data we receive from the technology we use to observe and gauge conditions on those planets is correct. The argument goes on ad-infinitum


It's amazing that even today, we can't actually PROVE something we know is true! It's a really clever move for a religious organisation, nobody is likely to win the challenge and it can be turned around as an argument for the existence of god (nobody can prove that the earth moves around the sun, just as nobody can prove that god doesn't exist).


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[ This Message was edited by: Cycovision on 2006-02-10 20:15 ]
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Posted: 2006-02-10 21:12:51
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yeah but we can see the earth and sun moving, but we are yet to see any glimpse of god...

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[ This Message was edited by: batesie on 2006-02-10 20:55 ]
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Posted: 2006-02-10 21:43:38
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But when we see the earth/sun moving from this planet it can seem as either the sun moving round the earth or earth moving round the sun.

(but no sign of god either)
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Posted: 2006-02-10 22:28:02
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the problem of proving that the earth revolves around the sun comes up in the study of particle physics. where we learned that all particles have a spin and nothing is really sitting still. so perhaps in the course of movement of the universe, where every 'body' (body refers to planets, stars, etc) is moving constantly, the path of movement causes the earth to circumnavigate the sun. but that does not in any way prove that the sun remains motionless.
the theory that the entire universe is expanding, would lead us to believe that it is true that every 'body' is in constant motion. the effect of this constant motion could be that we percieve certain 'bodies' to move around others. but it is also likely that this is just a perception, from any 'fixed' point.
it would be just as difficult a task to prove that the universe is revolving around itself. but it is also just as likely.
if you take two objects and set them at a static distance from each other, and then change your point of view, it would appear at some places that they are closer or further from each other. even though you know otherwise, it is hard to prove to someone else who is just an observer, that they remain the same distance.
if you make it even more complicated, and set up a virtual solar system... you would notice a difference in all the distances when viewed from different angles. add to that the fact that every 'body' has its own motion, at different speeds and trajectories. since the whole system is in motion, an observation from any one place inside the system causes the thought that everything else is moving around that one.
since we have never observed the movement of the universe from the sun itself, all we have to go on is assumptions. it is very possible that we have found the right explanation, but it is still hard to prove that.
is it not possible that the whole system is rotating, and that because the sun is the most massive of these 'bodies' it's motion is less apparent than the others? if so, it is also possible that the universe itself rotates, but if the sun is in motion as well, what is it revolving around?
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Posted: 2006-02-10 22:37:36
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thats a good point
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Posted: 2006-02-10 23:04:44
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This 'discussion' should have been SOLVED a long time ago, since NASA has ever flown their (Space Shuttle) very 1st journey out of Earth ! Just like the discussion early on that the Earth is FLAT, only Viking ships were present at that time, then came the assumption of the aeroplanes etc. and was proven that the world is, YES - ROUND! What I do believe is that WE are NOT ALONE, UFOs do exist !
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Posted: 2006-02-10 23:42:19
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Quote:
On 2006-02-10 18:51:13, masseur wrote:

your first link is a good one but I feel that it involves a certain assumption about the stars being observed in order to provide the proof required whereas as I understand it, there can be no assumptions or variables involved in the proof

That's a fair point.

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in regards to a spacecraft observation, what proof is there that the spacecraft is stationary?


The spacecraft wouldn't be stationary in relative terms. However, the spacecraft could be programmed to maintain one position over the course of a year and measurements could be taken by other spacecraft and ground based observers to measure the stationary spacecraft's position relative to other points to ensure that it was in fact remaining in the same point.

Another possible method would be to launch probes towards the Sun at different times of the year. The probes would be launched on straight trajectories with no deviation. Each of the probes would reach the Sun no matter what time of year they were launched from Earth. The difference in time taken by those probes to reach the Sun from the Earth would also demonstrate that the Earth must indeed be moving for there to be an increase in time between different probes.

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and no, the universe revolves around me, at least from my point of view



All these egos! Are the larger egos in this thread attracting smaller egos and pulling them into orbits around themselves?

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[ This Message was edited by: scotsboyuk on 2006-02-11 07:01 ]
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Posted: 2006-02-11 08:00:20
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