初中生之友如果一个天体质量足够大、体积足够小，那么它的引力大得就会连光都逃不出去。这种天体就是黑洞。黑洞这一概念刚提出来时曾被人们称作痴人说梦，但科学家的研究日益证明这种天体的确存在，一些科学家还因研究黑洞而出了名，其中最有名的一个要算英国科学家霍金。近 Friends of junior high school If an celestial body is large enough and small enough, its gravity is so large that it cannot even escape. This celestial body is a black hole. When the concept of black hole was first proposed, it was once called ridiculous, but scientists’ research increasingly proves that this celestial body does exist. Some scientists have also made a name for studying black holes. The most famous one is the British scientist Hawking. near