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本帖最后由 细胞海洋 于 2012-8-4 10:40 编辑 0 k( \ Y, N& b
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# k, f+ K, t" X9 s5 oCOVER Illustration of the black hole in Cygnus X-1, a binary star
6 R+ m, P$ z/ }$ d6 c5 S( m; Q! gsystem 6000 light-years away. A disk of stellar material feeds this black hole, ) f( w% E6 U7 j" W' _( K
which is 15 times as massive as the Sun but less than 60 kilometers across. As
8 n* j9 R: _. @# X; _2 ~7 `' F7 lit falls toward the black hole, some of the material gets expelled in two
6 h) p2 e$ Y; j, Nopposite jets. A section highlighting recent research on black holes begins on 8 _. L7 z! T! r7 T
page 535. ' \! ^ Y6 G% ^ n8 g
For the story behind the cover, go to http://scim.ag/cov6094. Image: NASA/Chandra ) W0 h0 r, A# F! l1 b( a
X-ray Center/M. Weiss
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发表于 2012-8-4 08:26
发表于 2012-8-4 12:20
