2014年1月3日 Science

nero1981

2014年1月3日 Science# Y9 T3 k1 f* N4 |2 {  C6 X

0 w  i( s, }5 m1 d) T' l7 I1 ^COVER Artist's conception of gamma-ray burst (GRB) 130427A, one of the * o6 \- G8 w) ^' `
brightest and longest-lived GRBs observed to date. GRBs such as this one occur + F4 `% |3 e2 H! V) F4 \8 R1 A. ^
when the core of a massive star runs out of nuclear fuel, collapses, and forms a % Y; Y) W) Q1 ~
black hole that drives a powerful jet of plasma traveling close to the speed of . M/ ~4 {9 B. {& q" y* ~% H. `6 g$ O
light. See pages 34, 38, 42, 48, and 51. Image: ' }6 t+ u- f9 L
NASA/Fermi and Sonoma State University/Aurore Simonnet , f8 a$ D; q7 r" Q  b2 B8 ?
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