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M-Dwarfs Could Be the Best—or Worst—Extraterrestrial Homes
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13.05.2015
These stars may be both blessings and curses for life off Earth In the search for habitable worlds beyond our solar system, the biggest, hottest opportunities may be found around the smallest, coolest stars. Called M dwarfs, these stars have a mere fraction of the sun's mass and luminosity but are more than 10 times as numerous. Planets circling an M dwarf must be in a close orbit to the star to be warm enough for life, like campers huddling around a small fire. This proximity makes them relatively easy for planet hunters to find, and the prevalence of M dwarfs means there are plenty nearby to investigate.
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