logo - 刷刷题
下载APP
【简答题】

A Star Is Born
1 The VLT (Very Large Telescope) is the world"s largest telescope (望远镜) and is taking astronomers (天文学家) further back to the Big Bang than they ever thought possible. Located 2, 600 metres up in the Chilean Andes, it has four huge mirrors, each about the size of a London bus. The VLT is so powerful that it can spot a burning match 10,000 kilometres away.
2 This astonishing power will allow astronomers to see s in space from the birth of stars to the collision (碰撞) of galaxies (星系) on the edge of the cosmos (宇宙). The VLT is giving astronomers their best-ever view of the cosmos. The power of the VLT to see the smallest detail at the furthest distances makes its designers amazed.
3 Take the case of Eta Carinae, one of the most explosive stars in the universe. This star produces ultraviolet laser rays (紫外线) and it will destroy itself in a few million years" time. It is five times brighter than the sun and when it explodes it is going to be a sight worth waiting for!
4 But it is at distances of millions, even billions, of light years that the VLT really shows its power. The VLT can detect light that set out on its journey before the earth even existed. This gives astronomers their first-ever detailed views of s that took place in the earliest days of the cosmos.
5 In other words, the VLT is a kind of a time machine. It takes astronomers back to a time when complete galaxies crashed into each other. The effects of these past collisions can now be seen by scientists, and astronomers believe the telescope will reveal more about these exciting s in the years to come. One day, we might be able to say we have traveled back to the beginning of time, and we will have a much clearer picture of how our planet was born. A Star Is BornScientists believe the VLT will tell us more about ______.

举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】哈勃望远镜是以下什么望远镜?()

A.
空间望远镜
B.
射电望远镜
C.
光学望远镜
D.
以上都不是

【单选题】发明望远镜的人是

A.
斯台文
B.
布鲁诺
C.
哥白尼
D.
伽利略

【多选题】下列对我国古代天文学成就的描述中,正确的是

A.
诗经中有中国历史上第一次有确切日期的月食记录
B.
春秋保存了世界上关于哈雷彗星的最早记录
C.
甘石星经是世界上最早的天文学著作,书中记录了800多个恒星的名字,并划分其星宿与体系,对后世发展颇具影响。
D.
汉书五行志中有世界公认的较早的黑子记录
E.
隋朝和尚一行在世界上第一次测量出地球子午线长度,他通过观察发现了恒星位置移动现象

【单选题】射电天文学开始于什么年代?()

A.
20世纪初
B.
20世纪30年代
C.
20世纪60年代
D.
20世纪90年代