期刊
SCIENCE
卷 344, 期 6181, 页码 277-280出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1249403
关键词
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资金
- Research Opportunities in Space and Earth Sciences Kepler Participating Scientist Program [NNX12AD21G]
- NASA [NNA13AA93A, NAS5-26555]
- NASA Postdoctoral Program at the Ames Research Center
- Kepler Participating Scientist Program
- Pennsylvania State University
- Eberly College of Science
- Pennsylvania Space Grant Consortium
- European Research Council [209622: E3ARTHs]
- NASA Science Mission directorate
- NASA Office of Space Science [NNX13AC07G]
- National Science Foundation (NSF)
- National Research Council (Canada)
- Comision Nacional de Investigacion Cientifica y Tecnologica (Chile)
- Australian Research Council (Australia)
- Ministerio da Ciencia, Tecnologia e Inovacao (Brazil)
- Ministerio de Ciencia, Tecnologia e Innovacion Productiva (Argentina)
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'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.
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