Black holes lead stars to self-destruct Scientists have long understood that supermasvive black holes weighing. Millions or billions of suns can tear apart stars that come too close. The black holegravity pulls harder on the neatest part of the star, an imbalance that pulls the star apart over a period of minutes or hours, once it gets close enough. When the star gets Close enough, the uneven forces flatten it into a pancake shape. Some previous studies had suggested this flattening would increase the density and temperature inside the star enough to trigger intense nuclear reactions that would tear it apart. But other studies had suggested that the picture would he complicated by shock waves generated during the flattening process and that not nuclear explosion should occur. The devouring of stars by black holes may already have been observed, although at a much later stage. It is thought that several months after the event that rips the star apart, its matter starts swirling into the hole itself. It heats up as it does so, releasing ultraviolet light and X-rays. Brassart aggress. Perhaps it can be observed in the X-rays and gamma rays, but its something that needs to be more studied,he says. Supernova researcher Chris Fryer of the Los Alamos National Laboratory in Los Almos, New Mexico, US, says the deaths of these stars are difficult to simulate, and he is not sure whether the researchers have proven their case they exploded in the process. A the black hole could tear apart the star C the black hole could dwindle its size considerably 2.According to the third paragraph, researchers differed from each other in the problem of B whether the stars would increase its density and temperature D whether the uneven forces would flatten the stars A No nuclear explosion would be triggered inside the star C. Much of the stars matter thrown by the explosion would be beyond the black holes reach 4.What will happen several months after the explosion of the star? B the black holes matter will heat up D the black holes matter will release ultraviolet light and X-rays A confusion C interruption
40天攻克大学英语四级:听力题型的解析引申题Day 19
大学英语四级考试听力短文的精选第27篇:Encouragement
听力题应试技巧:听力考试的题型的分析
大学英语四级考试听力短文的精选第25篇:Difference Between Culture
CET4听写部分三种应试的技巧
与“房间”相关的也许单词
英语四级考试听力原文的完整版
与"烟、酒“相关的一些单词
与“删减、取消”相关的一些单词第126讲
听力题应试的技巧:信息的概括能力和表达能力
听力题应试的技巧:已经考过的听写词
英语四级全面复习:听力常见场景的词汇
与帮助相关的一些单词
听力题应试技巧:考试听力部分应对的方案
40天攻克大学英语四级:听力题型的解析职业身份题Day 7
听力题应试的技巧:精确听每一词每一句
听力题应试的技巧:短对话听力的应对策略
40天攻克大学英语四级:听力题型的解析观点态度题Day 12
40天攻克大学英语四级:听力题型的解析地点场景题Day 9
40天攻克大学英语四级:听力题型的解析计算类概述Day 1
40天攻克大学英语四级:听力题型的解析事实状况题Day 14
40天攻克大学英语四级:听力题型的解析计算题Day 2
听力题应试技巧:听力横竖的结合法
与“考试,调查”相关的一些单词
与睡觉相关的一些单词
听力题应试技巧:复合式的听写题
与激动相关的一些单词
四级听力中的10大标志的词汇
英语四级听力题应试技巧:新四级听力题型的浅析
CET4英语四级考试全真的模拟题
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |