PTE听力口语-科学60秒: 宇宙中的星星比想象的多得多

PTE考生目前最大的问题之一就是练习题缺乏。除了有限的基本官方书(PLUS,Testbuilder, OG)之外就没有题了。很多英语基础不是很扎实的同学很难找到练习材料。悉尼文波雅思PTE培训学校专门为澳洲,尤其是悉尼、墨尔本的PTE考生准备了适合PTE听力阅读练习的科学60秒。各位PTE同学可以练习PTE听力中的summarise spoken text和PTE口语中的retell lecture,PTE听力口语-科学60秒-Frosty Moss练习记笔记技巧和复述。废话少说,下面开始:


 

The discovery that elliptical galaxies have manymore red dwarf stars than the Milky Way meansthat the universe might have three times as manytotal stars as previously thought. Cynthia Graberreports

研究发现,椭圆星系比银河系有更多的红矮星,这意味着宇宙中的星星比原来想象的要多三倍。

To many who stare up at the heavens, the stars may seem simply uncountable. Of course thats not the attitude of astronomers. But theyve made a discovery that means there are probably a lot more stars in the universe than they thought.

Red dwarfs are stars that are only 10 to 20 percent as massive as our sun. Theyre so faint that astronomers werent able to detect them in any galaxies other than our own Milky Way, and neighbour ones.

So researchers used sensitive instruments at the Keck Observatory in Hawaii. They found faint signatures of these red dwarf stars in eight massive elliptical galaxies relatively close to usbetween 50 million and 300 million lightyears away. And they discovered that these galaxies were home to 20 times as many red dwarfs as there are in the Milky Way.

The finding means leads astronomers to believe that there may be three times as many stars in the universe as theyd previously theorized. The research was published in the journal Nature. [Pieter van Dokkum and Charlie Conroy, A substantial population of lowmass stars in luminous elliptical galaxies]

And a recently discovered exoplanet orbiting a red dwarf had some Earthlike qualities. Lead researcher Pieter van Dokkum says there could be trillions of Earths orbiting the ubiquitous red dwarfs.

Cynthia Graber

 

墨尔本悉尼文波PTE雅思培训学校原创首发

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