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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
0 s3 z5 ? r! p; A0 v5 lsystem 6000 light-years away. A disk of stellar material feeds this black hole, $ J) O4 ~# s* ^$ A2 r3 G$ O
which is 15 times as massive as the Sun but less than 60 kilometers across. As
1 c6 M* f N& X( m5 A# d0 d" Q1 ~! qit falls toward the black hole, some of the material gets expelled in two + \6 p( r3 Q2 z2 Q; M, l
opposite jets. A section highlighting recent research on black holes begins on , ^* M/ A. ?2 z6 ^4 |7 U
page 535. 3 Z& U! Z6 U9 a! l, d$ T' o$ {
For the story behind the cover, go to http://scim.ag/cov6094. Image: NASA/Chandra * k {5 f' h$ o" ]8 |
X-ray Center/M. Weiss " }7 z( K: Y- Y2 P( M4 d
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发表于 2012-8-4 08:26
发表于 2012-8-4 12:20
