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A '''black hole''' is a theoretical prediction of the [[theory of relativity]]. Evidence for Black holes is primality obtained by watching their effects on a nearby "normal" star. The black hole remains a popular topic for magazines, the science page of the [[New York Times]], and scientists on the cutting edge of astronomy and cosmology, as well as being a popular device in sci-fi due to its inherent "coolness factor".
A '''black hole''' is a theoretical prediction of the [[theory of relativity]]. It is impossible to prove that a black hole does not exist, and thus it fails the [[falsifiability]] requirement of science. Nevertheless, the theoretical black hole remains a popular topic for magazines, the science page of the [[New York Times]], and scientists on the cutting edge of astronomy and cosmology, as well as being a popular device in sci-fi due to its inherent "coolness factor".
[[Image:Iu8969hu.jpg|right|thumb|300px|Artist's conception of a binary system consisting of a black hole and a main sequence star. The black hole is drawing matter from the main sequence star via an [[accretion disk]] around it, and some of this matter forms a gas jet.]]
[[Image:Iu8969hu.jpg|right|thumb|300px|Artist's conception of a binary system consisting of a black hole and a main sequence star. The black hole is drawing matter from the main sequence star via an [[accretion disk]] around it, and some of this matter forms a gas jet.]]