Eta Carinae As possibly the galaxys most massive star, Eta Carinae is now engaging in some very unusual behaviour. Australian astronomers, being in the Southern Hemisphere , are able to observe it clearly. While it is not unusual for stars to vary in brightness, the period is usually much shorter. Since 1992 it has become four times brighter, and then last year it began to drop dramatically, he said. Eta Carinae is of particular interest to astronomers because it seems to be in its death throes. Being so large it will end up as a supernova . There has not been a supernova in our galaxy since the invention of the telescope. While a 1987 explosion in a nearby galaxy gave astronomers plenty of valuable data, they are hungry for an even closer look. 31. Eta Carinae is now engaging in C. some very frightening behaviour. D. some very strange behaviour A. over which star vary in brightness C. Eta carinae takes to become a supernova. 33. Eta Carinae is hard to observe because C. the binoculars are not powerful enough.D. it does not send out infrared light. A. it is in its final stage. B. it is a supernova. 35. Which of the following statements about Eta Carinae is NOT true? B. It can be seen only through binoculars. D. Its ultraviolet laser is brighter than that of the Sun.
08年宁夏高考英语作文(答案)
高考英语满分作文 :对人们大量捕杀动物的看法
高考英语满分作文 Air(空气)
09高考英语最新时事热点作文预测 08高考作文总结 灾害
2002年高考英语作文
高考英语满分作文 关于良好师生关系
高考英语满分作文 Water(水)
高考英语满分作文 Tiger(老虎)
09高考英语最新时事热点作文预测 08高考作文总结 环境
高考英语满分作文 我们应该看重诚信还是看重能力
高考英语满分作文 Mending a Puncture(补车胎)
高考英语满分作文 A Part
高考英语满分作文 时间是宝贵的(THE VALUE OF TIME)
高考英语书面表达范文30套
高考英语作文:乡村的秋天
高考英语满分作文 Bamboo(竹子)
高考英语作文:幸福的家庭
高考英语满分作文 Cactuses(仙人掌)
高考英语作文范文:为什么学生们渴望上大学
高考英语满分作文 英语作文(Good Manners)
高考英语满分作文 The Importance of Water(水的重要性)
高考英语满分作文 写回信,朋友来旅游
高考英语满分作文 一次受表扬的经历
高考英语满分作文 Review (复习)
高考英语满分作文 How to Use the Dictionary?(怎样使用词典?)
高考英语满分作文 介绍自己的基本情况
高考英语满分作文 Advertisement-广告
高考英语满分作文 A Letter of Application(一封求职信)
高考英语满分作文 给报社写信关于土地荒漠化的英语作文
高考英语满分作文 公园要不要收门票?
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |