![Nearby Star Hosts 7 Earth-Size Planets [Video]](https://www.scientificamerican.com/sciam/cache/file/4FC47A43-8E18-44DB-8421079287E4A8EF.jpg)
Astronomers say at least three of the worlds may be habitable, and could be studied for signs of life within a decade --
Astronomers say at least three of the worlds may be habitable, and could be studied for signs of life within a decade --
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