慢速英语:New Information Adds to Understanding of Black Holes(翻译)

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galaxy – n. any one of the very large groups of stars that make up the universe

Perseus cluster – n. the group of galaxies in the star group of Perseus

x-ray spectrometer – n. an instrument used to measure x-rays

cosmic – adj. of, or relating to, the universe or outer space

constellation – n. a group of stars that forms a particular shape in the sky and has been given a name

supergiant – adj. something extremely large

precise – adj. very correct and exact​

eventually – adv. at some later time : in the end​

condensed – adj. reduced to a smaller or dense form

potential – n. a quality that something has that can be developed to make it better​