Measuring sun's true direction

Since the gravity center of the system is "off center" from the sun and Earth orbits the gravity center of the sun it seems we still have the gravity center of the system at another location. What would be attracted to that gravity center? There is a 12 year cycle also which may be the system's cycle while the Earth's cycle is one year.

<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>Since the gravity center of the system is "off center" from the sun and Earth orbits the gravity center of the sun it seems we still have the gravity center of the system at another location. What would be attracted to that gravity center? There is a 12 year cycle also which may be the system's cycle while the Earth's cycle is one year.<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

Nothing is ever attracted to the barycenter. There is no mass there. Jupiter pulls both Sun and Earth toward itself in a 12-year cycle. This is why both Sun and Earth circle the barycenter in 12 years. -|Tom|-

Over the weekend I did a 'quick' calculation just to see how fast graviton actually do move - assuming they actually exists). Assuming the 20 billion times c speed that would be something like 600000+ light years per second! At that speed the galaxy seems a whole lot smaller.
For distances like the Sun-Earth distance this would seem rather instantaneous but over a timespan of millions or billions of years some propagational delay could cause a 'slight' spiralling out of the planets. I have not done the math for it but could this be part of the reason why planets seem to migrate further away from the sun during their lifetimes (considdering ages of billions of years)

In the case of the Earth-Moon system tidal forces obviously play a far greater role. Perhaps even on a Sun-planet scale it would be greater than the above mention effect.

Perhaps it seems like a stupid question but still fascinated with the concept.

Rudolf

<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>Over the weekend I did a 'quick' calculation just to see how fast graviton actually do move - assuming they actually exists). Assuming the 20 billion times c speed that would be something like 600000+ light years per second! At that speed the galaxy seems a whole lot smaller.<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

My estimate is about a factor of 1000 slower. Not that we could notice the difference!

<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>For distances like the Sun-Earth distance this would seem rather instantaneous but over a timespan of millions or billions of years some propagational delay could cause a 'slight' spiralling out of the planets. I have not done the math for it but could this be part of the reason why planets seem to migrate further away from the sun during their lifetimes (considdering ages of billions of years)<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

This effect is too small to matter much. Tidal forces are much more important -- especially in the early solar system when the Sun itself was a huge, low-density object. -|Tom|-

thanks again.

<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote> My estimate is about a factor of 1000 slower <hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

I think I screwed up somewhere doing the calculation. It should go something like this:

c is defined : 1 ly in 60 * 60 * 24 * 265.25 seconds = 22917600 seconds

If we take the assumed (probably higher) graviton speed as 20 000 000 000 times c then
gravition distance traveled in 1 second is then 20 000 000 000 /22917600 = 872.6917304 ly per second

Still very fast! In star trek terms that would be even past transwarp speeds <img src=icon_smile.gif border=0 align=middle>

Rudolf

<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>c is defined : 1 ly in 60 * 60 * 24 * 265.25 seconds = 22917600 seconds<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

You are right that, as I get older, the years definitely fly by faster. However, I don't think we can use the shortened year in this calculation. <img src=icon_smile_evil.gif border=0 align=middle> So you might want to make that 365.26 days in a year, in case you wanted a more precise lower limit. But your calculation already serves to give a good sense of the speeds we are talking about. -|Tom|-