在距离地球至少30亿光年外太空中，存在一个名叫阿贝尔2261的椭圆星系，其直径为一百多万光年，差不多是银河系直径的10倍。如此大星系若核心没有一个超大质量黑洞驱使肯定不行。但是哈勃太空望远镜的广角相机3观测数据显示，中心地区的超大质量黑洞竟然消失了，科学家无不感到惊讶。下面是相关新闻链接：https://www.sohu.com/a/443883605_383749

https://www.sohu.com/a/439152805_354970

因为星系会随着宇宙的膨胀而膨胀。由《引力定律的修正及其应用》http://blog.sciencenet.cn/blog-3412139-1270565.html 公式（4.1）可知，当星系的半径R增大到一定程度时，星系中心的黑洞会自动消失。

我们可以预言在宇宙中存在大量中心已经消失了黑洞的星系，而且随着宇宙的膨胀，越来越多的星系将丧失其中心的黑洞。

In space at least 3 billion light-years from Earth, there is an elliptical galaxy called Abel 2261, which is more than a million light-years across, about 10 times the diameter of the Milky way. You can't have a galaxy this big without a supermassive black hole at its core. But to the surprise of scientists, data from the Hubble Space Telescope's Wide Field Camera 3 show that the central supermassive black hole has disappeared. Here are links to the news: https://www.sohu.com/a/443883605_383749

https://www.sohu.com/a/439152805_354970

Because galaxies expand as the universe expands. According to Equation (4.1) of the blog article: http://blog.sciencenet.cn/blog-3412139-1270565.html, when the radius of the galaxy R increases to a certain extent, the black hole at the center of the galaxy will automatically disappear.

We can predict that there are many galaxies in the universe that have lost their central black holes, and as the universe expands, more and more galaxies will lose their central black holes.