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本帖最后由 细胞海洋 于 2012-8-4 10:40 编辑 ; E( w+ E' A# ~
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0 [! K8 X" ]" o: r, TCOVER Illustration of the black hole in Cygnus X-1, a binary star 1 B2 Y) ]7 X' C. M
system 6000 light-years away. A disk of stellar material feeds this black hole, , K6 W, Z! K) S- u
which is 15 times as massive as the Sun but less than 60 kilometers across. As ' o5 a- U# q6 R3 G6 l
it falls toward the black hole, some of the material gets expelled in two
( Y8 X) Y, U; g% J1 C! F1 S- O% f! nopposite jets. A section highlighting recent research on black holes begins on
- d" F: ~7 ?7 j6 z1 T9 U" |page 535.
4 ?. p: G$ A c2 e3 R- KFor the story behind the cover, go to http://scim.ag/cov6094. Image: NASA/Chandra 6 \( h1 T# T0 G0 L, H
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
