Seven small planets whose surfaces could harbour liquid water have been spotted around a nearby dwarf star. If such a configuration is common in planetary systems, our Galaxy could be teeming with Earth-like planets. See Letter p.456
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Snellen, I. Earth's seven sisters. Nature 542, 421–422 (2017). https://doi.org/10.1038/542421a
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DOI: https://doi.org/10.1038/542421a
