寻找黑洞既然黑洞不发出任何辐射,不抛出任何物质,用一般方法直接观测黑洞当然是不可能的。此外,尽管其引力场对邻近区域十分强大,但在星际距离上,其引力并不比普通恒星更强,所以通过引力观察它们也不现实。 Finding Black Holes Since black holes do not emit any radiation and do not throw out any matter, it is of course impossible to observe the black hole directly by ordinary methods. In addition, although its gravitational field is very powerful for the adjacent area, its gravitational force is not stronger than that of an ordinary star at interstellar distance, so it is not realistic to observe them through gravity.