Our Universe appears timeless and unchanging, the stars taking nightly flights across the sky. But over long periods of time, you realize that our local region, and even the entire Milky Way is in constant motion. The constellations we see today would be very different millions or even thousands of years ago. Today we'll discuss stellar motion, how astronomers detect it and how it's useful.
Fraiser Cain, Universe Today
Pamela Gay, StarStryder
Astronomy Cast Ep 283
December 2012
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