the sun revolves around the earth

[Zylstra]

since all motion is relative (a body can only move in relation to another body, multiple bodies, or a fixed point within a measurable field as viewed by an outside party- another 'body'), one could image the earth as being stationary and the sun traveling around the Earth. Of course, this requires a much more complex imagining of the motions of the other bodies, which is why it is seldom used (it is far simpler and easier {and therefore more useful} to imagine or solar system from a fixed perspective which imagines the sun as 'stationary' relative to the orbits of the other bodies). However, one could imagine Earth as the stationary body around which Sol moves while the other bodies orbit Sol and, technically, one wouldn't be incorrect, but rather adopting a non-standard frame of reference for the observation of the movement of the heavenly bodies.

Using this frame of reference, we see that rather than the solar system spinning around a black hole, the black hole orbits the the Earth, getting ever closer and pulling other bodies near to it.

Standard? Definitely not. Useful? Not really? Needlessly complex a model/visualization? A poor choice for a frame of reference for any real application? Perhaps. But technically not wrong...


Next week: we all orbit a single electron....

 

[Icefire9atla]

That's relativity for you. When I walk, I could just as easily say that everything else in the universe is moving and I'm staying still.

 

[borrofburi]

That's relativity for you. When I walk, I could just as easily say that everything else in the universe is moving and I'm staying still.

Go run on a treadmill for 40 minutes (or as long as it takes to make you completely exhausted (but minimum of 20 minutes or so)), and this idea that when you walk the whole earth moves becomes your reality. You just spent so much time running without anything moving that when you run and things do move, it feels less like you are carrying yourself across the ground and more like you are staying still.

 

[Zylstra]

Man. pushing the universe around with my feet it getting tiring...

 

[Geochron]

One time I dropped a piece of chalk and changed history. Think about it.

 

[Master_Ghost_Knight]

In away it is correct, but there is just a problem. It is not indifrent that you chose an inertial frame of reference and an acelerated frame of reference or a spining frame of reference (i.e. not invariant). Even tough you can arrive to the same conclusion with any diffrent prespesctives, in some you will have to deal with some types of ficticional forces while in the other you don't. And the all concept snags when we come to relativity because in spining frames of references you can get bodys traveling faster then the speed of light from your prespective.
So it is not entierly indifrent.

 

[Zylstra]

In away it is correct, but there is just a problem. It is not indifrent that you chose an inertial frame of reference and an acelerated frame of reference or a spining frame of reference (i.e. not invariant). Even tough you can arrive to the same conclusion with any diffrent prespesctives, in some you will have to deal with some types of ficticional forces while in the other you don't. And the all concept snags when we come to relativity because in spining frames of references you can get bodys traveling faster then the speed of light from your prespective.
So it is not entierly indifrent.

Could you say that in sober english?

 

[Master_Ghost_Knight]

Could you say that in sober english?

I know my english kind of sux, but this is prety much acessible as far as language goes, if you didn't understand what I meant then you are most probably not familiar with the concept or terminology.

To sumarize what I have just said:
In a certain way you statment was correct if certain aspects are taken into consideration (that you wouldn't need otherwise) and you can arrive to the same conclusion, but it is not indifferent because the problem is completly different if you look it one way or the other.

 

[scalyblue]

Not to be pedantic, but you're all wrong. :twisted: Sol and Earth both orbit a common point which--due to the relative mass involved--happens to be near the center of Sol.

 

[Master_Ghost_Knight]

Not to be pedantic, but you're all wrong. :twisted: Sol and Earth both orbit a common point which--due to the relative mass involved--happens to be near the center of Sol.

Atcually that is not correct either, to be exact they move acordingly the integral of forces in no particular orbit. It just happens to look periodic at our scales, but it isn't.
Beat that!

 

[Zylstra]

You're all wrong. ou don't even exist! Earth doesn't exist! You're all just part of my delusion!

 

[scalyblue]

Atcually that is not correct either, to be exact they move acordingly the integral of forces in no particular orbit. It just happens to look periodic at our scales, but it isn't.
Beat that!

I--I can't!