看黑洞照片前了解一下托福听力中的黑洞词汇（一）-上海新东方学校

　　以下是新东方托福为您带来的看黑洞照片前了解一下托福听力中的黑洞词汇（一），更多托福考试资讯请关注新东方托福。

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　　第一张黑洞照片将被公布。全球六地同步展示。据人民日报消息，4月10日晚9时，人类首张黑洞照片即将在比利时布鲁塞尔、智利圣地亚哥、中国上海和台北、日本东京、美国华盛顿全球六地同步发布。此前，天文学家都是通过各种间接的证据来表明黑洞的存在，而此次通过EHT事件视界望远镜项目则是通过这个拥有地球直径的“虚拟望远镜”直接观测到了黑洞边缘的图像。

　　事实上，黑洞也是托福听力经常出现的内容。下面新东方网托福频道就和大家分享有关黑洞(black holes)的英文介绍和常用词。

　　Astronomers think the object shown in this Chandra X-ray Observatory image (in box) may be an elusive intermediate-mass black hole. Located about 32 million light-years from Earth in the Messier 74 galaxy (M74), this object emits periodic bursts of x-rays at a rate that suggests it is much larger than a stellar-mass black hole but significantly smaller than the supermassive black holes found at the centers of galaxies. Few such middling black holes have been discovered, and scientists aren't sure how they form.

　　Black holes are the cold remnants of former stars, so dense that no matter—not even light—is able to escape their powerful gravitational pull.

　　While most stars end up as white dwarfs or neutron stars, black holes are the last evolutionary stage in the lifetimes of enormous stars that had been at least 10 or 15 times as massive as our own sun.

　　When giant stars reach the final stages of their lives they often detonate in cataclysms known as supernovae. Such an explosion scatters most of a star into the void of space but leaves behind a large "cold" remnant on which fusion no longer takes place.

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