【英语时差8,16】欺骗苏联科学家的“外星人”（下）

（单词翻译）

 So what was the mysterious source of radio waves? It was the first quasar ever spotted¹. The word quasar is short for “quasi stellar radio source.” Quasi stellar just means they look like stars, and radio source means they emit radio waves even ones that pulsate² with amazing regularity³ and make people on Earth think they must be hearing a communication from aliens. Quasars are incredibly dense⁴ objects that were formed in the early universe and put out a tremendous amount of energy. In fact, one quasar can emit a hundred times more energy than our entire milky⁵ way galaxy⁶!