Are black holes real?, asks NOVA
Again? From NOVA:Today, there is wide scientific consensus that black holes are real. Even though they can’t be observed directly—by definition, they give off no light—astronomers can infer their hidden presence by watching how stars, gas, and dust swirl and glow around them. But what if they’re wrong? Could something else—massive, dense, all-but-invisible—be concealed in the darkness? A telescope as big as the Earth could tell a black hole from an exotic imposter. While black holes have gone mainstream, a handful of researchers are investigating exotic ultra-compact stars that, they argue, would look exactly like black holes from afar. Well, almost exactly. Though their ideas have been around for many years, researchers are now putting them to the most stringent Read More ›