几乎每个星系都有一个黑洞
Spectacular jets are powered by the gravitational energy of a supermassive black hole in the core of the elliptical galaxy Hercules A. The jets shoot through space for millions of trillions of miles. This image, taken by the Hubble Telescope, was originally released in November 2012. Learn more about black holes: NASA’s Field Guide to Black Holes Image...