News Release Archive:

News Release 490 of 1051

November 17, 2005 01:00 PM (EST)

News Release Number: STScI-2005-32

Hubble, Sloan Quadruple Number of Known Optical Einstein Rings


Image: Gravitational Lens Candidates

Gravitational Lens Candidates

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This collection of images shows 28 gravitational lens candidates. Astronomers studied these photos, which were taken by the Hubble Space Telescope's Advanced Camera for Surveys, and identified which of the candidates were gravitational lenses. These candidates were selected from the Sloan Digital Sky Survey. Gravitational lensing occurs when the gravitational field from a massive object warps space and deflects light from a distant object behind it. The reddish-white objects in the center of each image are massive galaxies. The blue arc-like patterns around many of the galaxies are the smeared light from distant galaxies that are behind the massive galaxies.

Image Type: Astronomical

Credit: NASA, ESA, A. Bolton (Harvard-Smithsonian CfA) and the SLACS Team


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