Changes

A '''black hole''' is a theoretical region of spacetime into which light and other matter can enter, but out of which nothing can ever emerge. Black holes were first hypothesized in 1783<ref name="r1">http://www.aps.org/publications/apsnews/200911/physicshistory.cfm</ref>, but the concept did not receive significant scientific attention until shortly after the publication of the [[general theory of relativity]] in 1915.

A '''black hole''' is a theoretical region of spacetime into which light and other matter can enter, but out of which nothing can ever emerge. Black holes were first hypothesized in 1783<ref name="r1">http://www.aps.org/publications/apsnews/200911/physicshistory.cfm</ref>, but the concept did not receive significant scientific attention until shortly after the publication of the [[general theory of relativity]] in 1915.

As with the related theoretical concept of a "[[wormhole]]",<ref>The prediction of the existence of wormholes, and its naming in 1957, predates the prediction and naming (1967) of a black hole.[http://www.nytimes.com/2008/04/14/science/14wheeler.html?pagewanted=print]</ref> 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 has become an increasingly popular topic for magazines, the science page of the [[New York Times]], and science fiction.

A '''black hole''' is a theoretical prediction of the [[theory of relativity]].  The black hole is 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 science. Nevertheless, black holes remain a controversial subject today.

 

Black holes remain a controversial subject today.

==Historical Models==

==Historical Models==