同学们,你们在晚上观察过星空吗?漫天星斗璀璨,十分迷人。科学家们为了观察到更美的星空,不断改进着仪器,进入20世纪后,突飞猛进的科学让天文学家有了一大批高精尖仪器,发现了很多奇妙的现象。其中有一个被科学家称为“世纪之谜”的超难问题,这便是暗物质问题。 My classmates, did you observe the sky in the evening? The stars are bright and charming. Scientists in order to observe the more beautiful sky, continuous improvement of the instrument, into the 20th century, the rapid advances of science so that astronomers have a large number of sophisticated instruments, found a lot of wonderful phenomenon. One of them, super-hard called “Mysteries of the Century” by scientists, is the dark matter issue.