> Is the earth's orbit stationary with respect to the other planets? All the planets have a pretty much eliptical orbit (at least that's what I've heard, and it would make sense), with the sun as one foci. This means that the second foci could be rotating around the sun (with respect to other planets). Is it? Whenever I see pictures of the solar system the elipses are all pretty lined up, so I was just wondering. There could be reasons for whether they do or don't line up, I'm just wondering which it is.

Mercury's orbit advances around the sun. I know that much. That would imply that other planets' orbits do too, but I can't remember having ever come across such information.

winter"The amount Mercury's orbit advanced was a proof of Einsteinien mechanics over Newtonion, I think."mute