Hey...got a quick question for someone who knows this stuff...
OK, I got into star gazing a couple years ago and bought some kind of Orion 5" tube telescope with an eyepiece sticking out the bottom side. Saw the moon craters and stuff and bought a star chart book and tried to get my kids interested in this. My son watched a tv program with Neil DeGrasse Tyson and he was saying that there was the Big Bang and everything was flung out from a single point going in all directions. OK, I get that. And that the sun is traveling thru space at over 500,000 miles per hour and pulling us and the other planets along with it as we orbit in a corkscrew pattern around it. My son asked how come the stars never change...like how can the dipper still have the exact position over all these years if everything is moving at over 12 million miles a day in all directions? I guess they are really far away and all, but are the stars that make up the dipper all the same distance from us? Theyd have to be, right? Otherwise the ones closer would appear to move more than the ones further out, right?
You're right they DO move. Just like the Polaris is not always going to be the north star due to earth's axis wobble. You can actually see the difference in position of Polaris from year to year. Useful to know when you are setting up your scope each night. Wired had a good explanation of this a few years ago ( GIFs Show Constellations Transforming Over 150,000 Years ).