Scientists fine-tune standards for habitable planets

M-dwarf planet
An artist’s conception shows a hypothetical planet with two moons orbiting within the habitable zone of an M-dwarf star. (NASA / Harvard-Smithsonian Center for Astrophysics Illustration / D. Aguilar)

Astronomers have identified thousands of stars that have planets, and that number could mushroom even faster when waves of next-generation telescopes come online. But where are the best places to look for life?

newly released study focuses on the most plentiful category of stars in our Milky Way galaxy — M-dwarf stars, also known as red dwarfs — and delivers good news as well as bad news for astrobiologists.

Get the full story on GeekWire.

By Alan Boyle

Mastermind of Cosmic Log, contributor to GeekWire and Universe Today, author of "The Case for Pluto: How a Little Planet Made a Big Difference," past president of the Council for the Advancement of Science Writing.

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