ab intra silentio vera
paradox said:Yes, of course. Despite the fact that not one (black hole, white whole, wormhole, dark matter, dark energy) has ever been physically observed; only "artist representations" or "artist interpretations." Yes, one can prove virtually anything one wants with mathematics, not unlike the case with statistics. Whether or not there is any actual correspondence with the physical universe. If you ever get a chance I do recommend viewing the Universe: The Cosmology Quest vid. If nothing else than just for kicks.
Space, your basic space-defining color, is black. The color of a black hole, it's most distinguishing feature is that it's black. So, 'ow you s'posed to see 'em?
After further consideration, I have to back peddle a tad. Perhaps black holes have been factually observed, i.e. at the center of every Idle Org [aka Ideal Morgue etc]; particularly of the financial sort, since the global economy is now based on a purely monetized, similarly non-material, conjured-from-thin-air [ala modern astronomy] currency system. But that's for another topic.