《科学》[Science]13年5月3日出版pdf全文

nero1981

1 {2 G' ]% c! a8 b- M: v
COVER Stylized comparison of the inner solar system (top) and
" \+ f) B. G( a+ k: [  ?. JKepler-62 (bottom), a five-planet system about 1200 light-years away. Like our
/ S: ~2 ~2 _8 |1 Usolar system, Kepler-62 hosts two planets in its habitable zone (depicted in
+ e3 K8 y( D; Jgreen), the region around a star where a planet could conceivably maintain # d! D) E9 `9 w6 S2 Q2 u
liquid water on its surface. The special section beginning on page 565 # \" L4 h% L2 s0 B7 d! Q  w
summarizes what we currently know about extrasolar planets. Illustration: ! X& ?' R+ k0 r. A5 c
NASA/Jet Propulsion Laboratory–Caltech/T. Pyle 8 P( X/ a! V  u# H

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