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本帖最后由 细胞海洋 于 2012-8-4 10:40 编辑 ) }/ D- W. T; r5 m
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COVER Illustration of the black hole in Cygnus X-1, a binary star ( ]% f$ p" r: \4 A- d3 E% Y! v
system 6000 light-years away. A disk of stellar material feeds this black hole,
; t+ A/ V' B3 e& [8 kwhich is 15 times as massive as the Sun but less than 60 kilometers across. As
8 G* k" w) ~$ f! p q$ i, Git falls toward the black hole, some of the material gets expelled in two / [% K/ z( v3 }
opposite jets. A section highlighting recent research on black holes begins on
5 J' E, C& ^5 E& ypage 535. 4 r, E" v5 J: e; s2 ]) b% R
For the story behind the cover, go to http://scim.ag/cov6094. Image: NASA/Chandra
H* n3 b- C5 E6 A! ~0 s NX-ray Center/M. Weiss # k, g+ r3 R/ h4 i/ H. R$ k
9 G% s! M9 j! C; M% F+ s
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发表于 2012-8-4 08:26
发表于 2012-8-4 12:20
