Is it true that most of the planets and stars have changed their positions and locations?

Answer 1

Depends on what you measure them relative to. As a solar system I think we are moving ... where I can't say - astronomers will know. The galaxy is no doubt zooming along to somewhere else. As for the planets moving - other than their orbits - I have no idea. I would assume it's possible if the mass of the planet or sun changed or if something intefered with it's gravitational links to other objects but it doesn't seem likely. ... o0;

Stars do change locations (taking their solar systems with them) and there's some really trippy animations showing some of the stars in our galaxy moving around somewhere. There's a thread in the something awful forums called Awesome Pictures of Science (or something similar to that) that has some of these animations in it.

Answer 2

It is true that most stars and planets have changed since all the stars that you see is the past. Some stars that you look up today may have gone supernova or become a white dwarf. The closest star other than the sun is Proxima Centauri, and we are looking at what that star looked like 4.22 years ago. The further the star the longer the speed of light travels and so you are peaking at the past when you look at the stars at night. Some stars up there are some of the first stars after the big bang and some are as old as the dinosaurs. Even for the sun you are actually looking at what occurred 15 minutes ago.

Answer 3

yes, since the big bang, all the stars and galaxies have been in a spiral, outward motion