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Galaxy Hosts 100 Billion Planets, in New Estimate

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Milky Way seen from Chile

The Milky Way is seen above an observatory in Chile.

Credit: ESO/Z. Bardon/ProjectSoft

Astronomers said Wednesday that each of the 100 billion stars in the Milky Way probably has at least one companion planet, adding credence to the notion that planets are as common in the cosmos as grains of sand on the beach.

From The Wall Street Journal
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