|MadSci Network: Astronomy|
I know that the stars in our galaxy orbit around the centre. How does this motion affect the positions of the stars and the configuration of the constellations, and how long would it take for this movement to become noticable? For instance, would a time-traveller recognise any constellations if he arrived on Earth 30,000 years ago? (The reason I specifically asked about 30,000 years is I'm writing a story about time- travel, and I'd like to get my facts right, if possible) Thanks!
Re: How do the constellations change over time?
Try the links in the MadSci Library for more information on Astronomy.