5 ms·

Thanks. I can understand the mass of the sun having an effect but why would the speed of rotation of the sun have an effect on earth's orbit?

• jacquesm 13y ago
  I think that's this effect: http://en.wikipedia.org/wiki/Tidal_acceleration http://en.wikipedia.org/wiki/Tidal_acceleration Speaking about the rotation of a gaseous body is a bit tricky anyway, not all parts of the sun rotate equally fast. (inside/outside, equatorial/polar).
  • barking 13y ago
    That's a very interesting link, the diagram of the earth moon system explains it quite well, I think. I just googled and found this article that reports the same effect between the earth and the sun http://www.newscientist.com/article/dn17228-why-is-the-earth-moving-away-from-the-sun.html#.UjbUUX_JLIc http://www.newscientist.com/article/dn17228-why-is-the-earth...