But there are images of binary star systems consisting of one normal star and one black hole, and of the central regions of Galaxies that are believed to contain black holes. 但是有由一个黑洞和一个正常恒星组成的双子星系统的图像,和被认为包含有黑洞的星系中心区域的图像。
However, if a black hole passes through a cloud of interstellar matter, or is close to another "normal" star, the black hole can accrete matter into itself. 然而,当一个黑洞穿过一片星云,或者靠近另一个正常恒星时,黑洞将会使它自身的物质增加。