《科学》[Science]13年5月3日出版pdf全文

nero1981

. S  d% G, ^* dCOVER Stylized comparison of the inner solar system (top) and + }  f" j- K" Q* A& t2 W
Kepler-62 (bottom), a five-planet system about 1200 light-years away. Like our 7 o' j' |1 w1 v# Y+ U0 t
solar system, Kepler-62 hosts two planets in its habitable zone (depicted in 7 w& U* z# f3 k4 A8 j
green), the region around a star where a planet could conceivably maintain
8 N; L) a/ y* v1 I* d! Mliquid water on its surface. The special section beginning on page 565 6 ]! z5 f' ]. [4 |: A' @+ e
summarizes what we currently know about extrasolar planets. Illustration: ( T) P- Y/ \& z1 w) k
NASA/Jet Propulsion Laboratory–Caltech/T. Pyle ) Z8 H3 s3 d' v% ^

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