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哈勃空间望远镜捕捉到的这张照片中的美仑美奂的五彩“丝带”是一次超新星爆发形成的。这次爆发所产生的光在320年前已经到达地球。这次爆发的残余被叫做仙后座 A,是银河系中最年轻的超新星残余,距离地球有一万光年之遥。那么,什么是新星和超新星呢?有时在某一星区突然看到一颗原来没有的亮恒星,经过几天到几个月,它又慢慢看不见了。因此,古人就把这类星叫新星。其实,它
The beautiful multicolored “ribbon” in this picture captured by the Hubble Space Telescope was formed by a supernova burst. The light produced by this eruption has reached the earth 320 years ago. The remnants of this eruption are called Cassiopeia A. It is the remnant of the youngest supernova in the Milky Way. It is 10,000 light-years away from Earth. So, what are the new stars and supernovae? Sometimes a star suddenly disappears in a certain star area, and after a few days to several months, it slowly disappears. Therefore, the ancients called this kind of star a new star. In fact, it