《自然》[Nature]12年2月9日出版pdf全文

nero1981

[hide][/hide]
5 @( h# k2 ~- c1 B  L+ F3 iHundreds of extrasolar planets have been found since the first confirmed discoveries in the mid-1990s. Many of them are large 'hot Jupiters', but steady improvements in observational capabilities have brought physicists closer to detecting smaller Earth-sized bodies, and now, the planet-hunting space observatory Kepler has discovered two in orbit around the Sun-like star Kepler-20. Planet Kepler-20 f has a radius almost identical to that of Earth, and Kepler-20 e is slightly smaller, at 0.87 times Earth's radius. The radii of the planets and the architecture of the system — at least three larger planets orbit the host star — suggest that the Earth-sized planets are rocky, and that the outer planet (Kepler-20 f) may have developed a thick atmosphere of water vapour.
5 h" F% ^* p0 [
) ^5 E0 W7 w. k1 S' K- e$ ~) j) j+ z' \0 c

eley

定~~~~~~~

tpwang

回复 nero1981 的帖子
) e7 o& X$ e9 s- p' z6 K3 \0 C% h0 ]; o+ {1 n+ Y( J
thanks

懵懂干细胞

谢谢分享

linlicau

good

ziyunfei1982

thanks a lot

zhanglianglu

非常帅气

双人鱼

Good

zorro

c ccc

menghy

谢谢分享！！