Einstein ring
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An Einstein ring, also known as an Einstein–Chwolson ring or Chwolson ring, is created when light from a galaxy or star passes by a massive object en route to the Earth. Due to gravitational lensing,
Einstein ring, created by a nearer galaxy (NGC 6505) distorting light of a distant galaxy. Four images of the distant galaxy, corresponding to four bright spots, can be seen in this picture.
"Smiley" or "Cheshire Cat" image of galaxy cluster (SDSS J1038+4849) and gravitational lensing (an "Einstein ring") discovered by an international team of scientists, imaged with HST
JWST false-color image of SPT0418-47, a high-redshift galaxy rich in organic molecules, which appears as a nearly-perfect Einstein ring
SDSSJ0946+1006 is a Double Einstein Ring. Credit: HST/NASA/ESA
Galaxy cluster
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A galaxy cluster, or a cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity, with typical masses ranging from 1014 to
Composite image of BoRG-58, a group of 5 galaxies clustered together just 600 million years after the Universe's birth
Galaxy cluster IDCS J1426 is located 10 billion light-years from Earth and has the mass of almost 500 trillion suns (multi-wavelength image: X-rays in blue, visible light in green, and infrared light in red).
Abell 2744 galaxy cluster – extremely distant galaxies revealed by gravitational lensing (16 October 2014).
Galaxy cluster SPT-CL J0615-5746.