Three planets of Neptune mass have been discovered orbiting a Sun-like star known to have an asteroid belt. Exquisite measurements suggest that the search for habitable planets might be easier than assumed.
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Charbonneau, D. A neptunian triplet. Nature 441, 292–293 (2006). https://doi.org/10.1038/441292a
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DOI: https://doi.org/10.1038/441292a
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