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Cosmic Choreography

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Andromeda Galaxy

Thirteen dwarf galaxies are lying in an extremely thin plane, 45,000 light years thick, but immense in size.

By Geraint Lewis

A newly discovered form of circle dancing is perplexing astronomers, not due to its complex choreography but because it's unclear why the dwarf galaxies are dancing in a ring around the much larger Andromeda Galaxy.

Geraint Lewis is Professor of Astrophysics at the University of Sydney.

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