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
2019-2020湖北武汉武昌区九年级下3月英语试题
2020届吉林省实验中学高三英语下学期第一次检测试题答案
2020届湖北省黄冈中学高一英语下学期3月月考试题答案
2019-2020广东湛江市霞山职业高级中学七年级下第一次月考数学试题答案
2019-2020河南淮阳羲城中学八年级下第一次月考英语试题答案
2019-2020山东五莲管帅中学七年级下英语第二次月考试题答案
2020届江西省赣州市高三英语仿真模拟试题
2019-2020山东临沂费县二中八年级下第一次月考英语试题
2019-2020河南省实验中学七年级下3月考试英语试题
2019-2020广东湛江市二十二中七年级下第一次月考英语试题
2019-2020山东临沂费县二中八年级下第一次月考英语试题答案
2019-2020河北邯郸市丛台区育华中学八年级第二次段测试英语试题答案
2020届成都外国语高新校区高三英语下学期第四次质量检测试题答案
2019-2020吉林长春净月区七年级下网络授课质量监测英语试题
2019-2020河北石家庄石门实验学校八年级下4月月考英语试题
2019-2020湖南长沙市铁路一中4月初二下英语试题
2019-2020广东湛江市霞山职业高级中学七年级下第一次月考数学试题
2019-2020陕西凤翔竞存中学七年级4月月考英语试题
2019-2020广东湛江市二十二中七年级下第一次月考英语试题答案
2020届广东省东莞市高三英语下学期线上摸底自测试题
2019-2020江苏盐城亭湖区永丰初级中学八年级下月考英语试题
2019-2020辽宁朝阳一中八年级下第一次月考英语试题
2019-2020山西省七年级下阶段性检测公益卷英语试题
2020届成都外国语高新校区高三英语下学期第四次质量检测试题
2019-2020上海风华中学七年级下4月考英语试题答案
2019-2020广东湛江市霞山职业高级中学七年级下第一次月考英语试题
2019-2020浙江天台县赤城中学八年级下第一次段试英语试题
2019-2020海南海口十四中七年级下第一次月考英语试题答案
2019-2020山东武城四女寺镇明智中学七年级下第二次月考英语试题
2019-2020辽宁锦州实验学校初二下第一次月考英语试题答案
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |