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Astrophysics

Tracking our neighbours' past

The collective motions of dwarf galaxies in planes around the Andromeda galaxy and the Milky Way have presented a challenge to theory. Interactions between galaxy groups in the distant past may have left their imprint on these dwarfs.

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Figure 1

JEAN-CHARLES CUILLANDRE & GIOVANNI ANSELMI/CFHT/COELUM

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Correspondence to Alan McConnachie.

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McConnachie, A. Tracking our neighbours' past. Nature 504, 226–227 (2013). https://doi.org/10.1038/504226a

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