An Earth-Sized Planet in the Habitable Zone of a Cool Star

作者：Quintana Elisa V^*; Barclay Thomas; Raymond Sean N; Rowe Jason F; Bolmont Emeline; Caldwell Douglas A; Howell Steve B; Kane Stephen R; Huber Daniel; Crepp Justin R; Lissauer Jack J; Ciardi David R; Coughlin Jeffrey L; Everett Mark E; Henze Christopher E; Horch Elliott; Isaacson Howard; Ford Eric B; Adams Fred C; Still Martin; Hunter Roger C; Quarles Billy; Selsis Franck

来源：Science, 2014, 344(6181): 277-280.

DOI：10.1126/science.1249403

The quest for Earth-like planets is a major focus of current exoplanet research. Although planets that are Earth-sized and smaller have been detected, these planets reside in orbits that are too close to their host star to allow liquid water on their surfaces. We present the detection of Kepler-186f, a 1.11 +/- 0.14 Earth-radius planet that is the outermost of five planets, all roughly Earth-sized, that transit a 0.47 +/- 0.05 solar-radius star. The intensity and spectrum of the star%26apos;s radiation place Kepler-186f in the stellar habitable zone, implying that if Kepler-186f has an Earth-like atmosphere and water at its surface, then some of this water is likely to be in liquid form.

• 出版日期2014-4-18