Harry Veeder wrote: > ----- Original Message ----- > From: Mauro Lacy <[email protected]> > Date: Monday, October 12, 2009 10:59 am > Subject: Re: [Vo]:Want to do some real astronomy? > > >> What I'm saying is this: even as early as in Copernicus times, the >> doorwas open, so to speak, for a consideration of the movements of >> the Sun >> as real(i.e. proper), but somehow in the course of history, that door >> was closed or forgotten, and we started to think about the Sun as >> fixed,for all practical purposes. And we still do this today, for all >> practical, cultural, and even scientific and astronomical purposes. >> > > > Who is 'we'? > I think every astronomer alive today knows that the sun is a star and it > moves around the centre of the milky way galaxy and that the centre of > the milky way is moving relative to other galaxies. >
Yes, but as we've seen that movement orbiting the center of the galaxy(which is a very long term movement with a period of some 250 million years) is not the only movement of the solar system. And regarding those other movements(which have probably a period much shorter than this other, relatively known movement around the center of the galaxy), we enter a kind of gray zone were there's not very much information available. At least, I wasn't able to find it at the moment. Although I was able to discover that these movements are being studied since at least 150 years ago. Curious, isn't?
