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Proper Motion of Ursa Major (the Big Dipper)

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Published on Oct 10, 2011

Download the original from:

http://www.astronomy.ohio-state.edu/~...

This movie shows the appearance of the Big Dipper (Ursa Major) for a 200,000 year period between 100,000 BC and 100,000 AD demonstrating the proper motion of the stars. All stars down to 6.5 magnitude are shown, and the timestep is 1000 years. Most of the bright stars making up the familiar constellation of the Big Dipper are part of a moving group, and can clearly be seen to be moving together towards the East (left on the frame) over time. Watch for very fast moving stars that cross the field over the 200,000 year period of this animation.

[Credit: R. Pogge, OSU Astronomy]

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