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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
3 A' G1 m1 G8 n x6 O1 m& Csystem 6000 light-years away. A disk of stellar material feeds this black hole,
5 P# m' V0 _: l* \9 c; Rwhich is 15 times as massive as the Sun but less than 60 kilometers across. As
( i5 f# b I& b7 Q! eit falls toward the black hole, some of the material gets expelled in two
. N4 t: K! R( Q8 e1 T9 qopposite jets. A section highlighting recent research on black holes begins on
+ `7 [9 Q/ D) M3 t/ P/ ]. r3 mpage 535.
0 S" U* Y# q- Q; ?" t! S2 j# I4 X* F' MFor the story behind the cover, go to http://scim.ag/cov6094. Image: NASA/Chandra
, i$ G9 s3 a4 F4 H( `( ]X-ray Center/M. Weiss 4 _8 \$ ^- ~9 q
1 G2 J0 e7 U- ]5 j/ D6 X ?[hide][/hide] |
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发表于 2012-8-4 08:26
发表于 2012-8-4 12:20
