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本帖最后由 细胞海洋 于 2012-8-4 10:40 编辑
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COVER Illustration of the black hole in Cygnus X-1, a binary star . }) N O4 j: H# o `1 [, ]
system 6000 light-years away. A disk of stellar material feeds this black hole,
: M0 u0 V$ I) ~* U, S! q" cwhich is 15 times as massive as the Sun but less than 60 kilometers across. As s" G2 M. w: ~) t
it falls toward the black hole, some of the material gets expelled in two % }% e* g ]+ D* g! ]3 o
opposite jets. A section highlighting recent research on black holes begins on
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For the story behind the cover, go to http://scim.ag/cov6094. Image: NASA/Chandra # E3 a" D' _5 ?- L
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
