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
上一篇: 职称英语考试阅读综合辅导第三讲
下一篇: 职称英语理工类阅读理解备考之练习题(2)
2016届高考英语一轮复习名师点评专项训练:完形填空28
2016届高考英语一轮复习基础考点聚焦:Unit2 English around the world单元检测同步探源 新人教版必修1
2016届高考英语一轮复习基础考点聚焦:Unit3 A taste of English humour单元检测同步探源 新人教版必修4
2016届高考英语一轮复习基础考点聚焦:Unit3 A taste of English humour跟踪训练夯实基础 新人教版必修4
韩餐馆菜单辣度标示惹争议 “白色食品”代表不辣被指歧视
川普为什么爱用这7种表情?
奥巴马的10句经典名言
新年去哪里旅行 全球最价廉景美TOP10景点来啦
2016届高考英语一轮复习基础考点聚焦:Unit3 Life in the future跟踪训练夯实基础 新人教版必修5
2016届高考英语一轮复习基础考点聚焦:Unit3 The Million Pound Bank Note单元检测同步探源 新人教版必修3
(七省专用)2016届高考英语一轮复习基础晨记提升:Module 6 Old and New 外研版必修3
2016届高考英语一轮复习基础考点聚焦:Unit2 Robots跟踪训练夯实基础 新人教版选修7
(七省专用)2016届高考英语一轮复习基础晨记提升:Module 6 The World’s Cultural Heritage 外研版选修7
2016届高考英语一轮复习基础考点聚焦:Unit1 Women of achievement跟踪训练夯实基础 新人教版必修4
2016届高考英语一轮复习基础考点聚焦:Unit3 Inventors and inventions跟踪训练夯实基础 新人教版选修8
2016届高考英语一轮复习基础考点聚焦:Unit3 The Million Pound Bank Note跟踪训练夯实基础 新人教版必修3
这8个超级富豪 身家抵世界较贫困半数人口之和
2016届高考英语一轮复习基础考点聚焦:Unit5 The power of nature单元检测同步探源 新人教版选修6
2016届高考英语一轮复习基础考点聚焦:Unit2 Cloning跟踪训练夯实基础 新人教版选修8
2016届高考英语一轮复习基础考点聚焦:Unit5 The power of nature跟踪训练夯实基础 新人教版选修6
2016届高考英语一轮复习基础考点聚焦:Unit2 Poems跟踪训练夯实基础 新人教版选修6
2016届高考英语一轮复习基础考点聚焦:Unit2 English around the world跟踪训练夯实基础 新人教版必修1
2016届高考英语一轮复习基础考点聚焦:Unit3 Inventors and inventions单元检测同步探源 新人教版选修8
为什么新年下的决心总是实现不了?
2016届高考英语一轮复习基础考点聚焦:Unit2 The Olympic Games单元检测同步探源 新人教版必修2
(七省专用)2016届高考英语一轮复习基础晨记提升:Module 6 Unexplained Mysteries of the Natural World 外研版必修4
(七省专用)2016届高考英语一轮复习基础晨记提升:Module 6 The Internet and Telecommunications 外研版必修1
Ends justifying means
2016届高考英语一轮复习基础考点聚焦:Unit3 Computers跟踪训练夯实基础 新人教版必修2
2016届高考英语一轮复习基础考点聚焦:Unit3 A healthy life单元检测同步探源 新人教版选修6