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2014年4月18日 Science4 c# u+ r Z5 |( T. J5 l+ m$ D
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COVER 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.
/ ?. o: W" N1 X1 M3 V0 C9 H Image: NASA Ames Research Center/SETI Institute/Jet Propulsion Laboratory–California Institute of Technology
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发表于 2014-4-18 20:06
