第1个回答 2009-04-19
General theory of relativity prediction one kind of specially compact dark heavenly body. The big quality star occurs in its evolved last stage collapses shrinks, its material is specially compact, it has is called “the arc of visibility” the seal boundary, in the black hole is going into hiding the huge gravitational field, because the gravitational field is specially strong including photon any material can only go, but inescapable.Forms the black hole the star nuclear mass lower limit the approximately 3 time of solar qualities, certainly, this is the final star nuclear mass, but is not the star in the main foreword time quality. Except this kind of star level black hole, also has the other origin black hole - - so-called miniature black hole possibly to form in the universe early time, but the so-called ultra big quality black hole possibly exists in the galaxy central committee.
The black hole does not let, no matter what how in boundary any thing by outside seeing, this is this kind of object is called “the black hole” the reason. We are unable the transmitted light reflection to observe it, can only through receive its influence the periphery object to come the indirect understanding black hole. Although such said that but the black hole has its boundary, namely " event arc of visibility (arc of visibility) “. According to the guess, the black hole is the death star surplus, is when special big quality super-giant collapsing contracts produces. Moreover, the black hole must be a quality is bigger than Qiandela the Saika limit to form the stellar evolution to the last stage, the quality is smaller than Qiandela the Saika limit star is unable to form the black hole本回答被网友采纳