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2014年4月18日 Science/ m! E$ n9 o! V( D' K' w R
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# g1 Y3 k+ z& K9 e. ~) e/ JCOVER Artist's concept of Kepler-186f, a planet located ~500 light-years from Earth in the constellation Cygnus. The discovery of Kepler-186f confirms that Earth-sized planets exist in the habitable zone of other stars (that is, the range of distances from a star wherein liquid water might pool on the surface of an orbiting planet) and signals a major step closer to finding a world similar to Earth. See pages 249 and 277.% _. J! [* W/ M7 @3 f3 [& d
Image: NASA Ames Research Center/SETI Institute/Jet Propulsion Laboratory–California Institute of Technology : o" A3 ~& ` _( J6 [: Z: M
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发表于 2014-4-18 20:06
