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Dark matter was postulated by [http://en.wikipedia.org/wiki/Fritz_Zwicky Fritz Zwicky] in 1934, to partially account for [[evidence]] of "missing mass" in the universe, including the [http://en.wikipedia.org/wiki/Galaxy_rotation_problem rotational speeds of galaxies], orbital velocities of galaxies in clusters, [http://en.wikipedia.org/wiki/Gravitational_lensing gravitational lensing] of background objects by [[galaxy]] clusters such as the [http://en.wikipedia.org/wiki/Bullet_Cluster Bullet Cluster], and the temperature [[distribution]] of hot gas in galaxies and clusters of galaxies. Fritz Zwicky is the "Father of Dark Matter," coining the term itself, as well as gravitational lensing and the sky survey [[technique]].

Dark matter was postulated by [http://en.wikipedia.org/wiki/Fritz_Zwicky Fritz Zwicky] in 1934, to partially account for [[evidence]] of "missing mass" in the universe, including the [http://en.wikipedia.org/wiki/Galaxy_rotation_problem rotational speeds of galaxies], orbital velocities of galaxies in clusters, [http://en.wikipedia.org/wiki/Gravitational_lensing gravitational lensing] of background objects by [[galaxy]] clusters such as the [http://en.wikipedia.org/wiki/Bullet_Cluster Bullet Cluster], and the temperature [[distribution]] of hot gas in galaxies and clusters of galaxies. Fritz Zwicky is the "Father of Dark Matter," coining the term itself, as well as gravitational lensing and the sky survey [[technique]].

 

Dark matter is believed to play a central role in [[structure]] formation and galaxy [[evolution]], and has [[Measure|measurable]] [[effects]] on the [http://en.wikipedia.org/wiki/Anisotropy anisotropy] of the [http://en.wikipedia.org/wiki/Cosmic_microwave_background cosmic microwave background]. All these lines of [[evidence]] suggest that galaxies, clusters of galaxies, and the [[universe]] as a whole contain far more [[matter]] than that which interacts with electromagnetic radiation: the remainder is frequently called the "dark matter component," even though there is a small amount of [http://en.wikipedia.org/wiki/Baryonic_dark_matter baryonic dark matter]. The largest part of dark matter, which does not interact with electromagnetic radiation, is not only "dark" but also, by definition, utterly [[transparent]].

Dark matter is believed to play a central role in [[structure]] formation and galaxy [[evolution]], and has [[Measure|measurable]] [[effects]] on the [http://en.wikipedia.org/wiki/Anisotropy anisotropy] of the [http://en.wikipedia.org/wiki/Cosmic_microwave_background cosmic microwave background]. All these lines of [[evidence]] suggest that galaxies, clusters of galaxies, and the [[universe]] as a whole contain far more [[matter]] than that which interacts with electromagnetic radiation: the remainder is frequently called the "dark matter component," even though there is a small amount of [http://en.wikipedia.org/wiki/Baryonic_dark_matter baryonic dark matter]. The largest part of dark matter, which does not interact with electromagnetic radiation, is not only "dark" but also, by definition, utterly [[transparent]].