"Stargazers of the future will look into a different night sky. That's because the stars are constantly moving relative to each other. These shifts are nearly imperceptible during a person's lifetime, but they add up over the centuries and millennia. This means that in, say, 50,000 years, many common constellations will have a very different shape."
See the other four constellation shifts at Discovery News.
Image credit: Starry Night Education software/Discovery News