你一定听说过黑洞吧!1939年,美国物理学家奥本海默和斯奈德设想,如果恒星的质量保持不变并不断地收缩下去,那么,恒里的密度就会越来越大,引力随分子间距离的减少而迅速增大,直至大到任何物质都不能从中跑出去,甚至光都被牢牢吸住.光都出不来了,人们看到的只能是一片“漆黑”,这就是黑洞. You must have heard of black holes! In 1939, the American physicists Oppenheimer and Snyder conceived that if the quality of stars were to remain constant and continue to shrink, then the density of Hengli would become greater and greater. The gravitational force increases rapidly with the decrease of the intermolecular distance, until it is so large that no substance can escape from it, and even the light is held firmly. The light cannot be seen, and people can only see it in black. "This is the black hole.