A stunning new image from the NASA/ESA Hubble Space Telescope shows the effects of gravitational lensing caused by SDSS J0952+3434, a very massive group of galaxies located approximately 4 billion light-years away in the constellation Leo Minor.
Galaxy clusters contain thousands of galaxies of all ages, shapes and sizes.
Typically, they have a mass of about one million billion times the mass of the Sun and form over billions of years as smaller groups of galaxies slowly come together.
The large mass of the galaxy cluster SDSS J0952+3434 creates the fascinating phenomenon of strong gravitational lensing.
The cluster’s gravity bends light coming from behind it in a similar way to how the base of a wine glass bends light.
The effects of this lensing can be clearly seen as an arc of light in the lower part of the new Hubble image.
“Just below center in this image of SDSS J0952+3434 is a formation of galaxies akin to a smiling face,” Hubble astronomers said.
“Two yellow-hued blobs hang atop a sweeping arc of light.”
“The lower, arc-shaped galaxy has the characteristic shape of a galaxy that has been gravitationally lensed — its light has passed near to a massive object en route to us, causing it to become distorted and stretched out of shape.”
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