The two Magellanic Clouds may have joined our Milky Way quite recently. It turns out that this trio of galaxies is remarkably unlike most other galaxy systems — both in the luminosity of the clouds and in their proximity to the Milky Way.
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van den Bergh, S. A strange ménage à trois. Nature 468, 901–902 (2010). https://doi.org/10.1038/468901a
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DOI: https://doi.org/10.1038/468901a
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