Legacy Astronomical Images > Miscellaneous Series > Cosmology Unit

Description

Cosmology is the study of the large-scale structure and evolution of the Universe.

Collection Items

Gravitationally Lensed Quasar
Description: This remarkable image is the result of a gravitational lens, an intervening body massive enough to form multiple images of a distant quasar, by the gravitational deflection of light. Two images of the quasar are seen in this radio map - the A image…

Einstein Ring 4C 05.51
Description: This radio source, 4C 05.51, has extremely unusual structure: a smooth low-surface brightness ring accompanied by two nearly diametrically opposed-compact sources, both offset to the southwest; The optical and radio spectral properties appear…

CLASS Survey Gravitational Lenses
Description: These radio maps, obtained with the VLA, show 21 gravitational lenses discovered as part of CLASS (Cosmic Lens All-Sky Survey) plus a rediscovery of a previously known lens system. A gravitational lens is formed when a galaxy lies close to the line…

Gravitational Lens Image of Quasar PSS J2322+1944
Description: Optical (visible-light) image of quasar PSS J2322+1944, made at the W.M. Keck Observatory, showing twin images indicating gravitational lensing (left). At right, a VLA image shows redshifted CO gas emission, revealing the "Einstein Ring" lens effect.…

Six-Image CLASS Gravitational Lens
Description: This object was discovered during the third phase of the Cosmic Lens All-Sky Survey (CLASS), an international collaboration that searches for new cases of gravitational lensing among compact radio sources. This is a composite image showing the Hubble…

Gravitational Lens CLASS B1933+503
Description: The Cosmic Lens All-Sky Survey (CLASS) is an international project aimed at discovering a large number of gravitational lens systems to provide a well-selected controlled sample for cosmological studies. CLASS has yielded many new lenses, one of…

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