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ohmysagan:

The Changing Big Dipper

Over time, the motions of the stars within the Big Dipper will change its appearance.

Five of the stars of the Big Dipper are at the core of the Ursa Major Moving Group. The two at the ends, Dubhe and Alkaid, are not part of the swarm, and are moving in the opposite direction. Relative to the central five, they are moving down and to the right in the map. This will slowly change the Dipper’s shape, with the bowl opening up and the handle becoming more bent.

For teaching: astrophysics

Reposted fromscienceporn scienceporn

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