spaceexp:An “Einstein Ring”or gravitational lensing at work: the blue galaxy is behind
spaceexp: An “Einstein Ring”or gravitational lensing at work: the blue galaxy is behind the yellow galaxy but we can see it because the light from the far galaxy gets wrapped around by the closer galaxy. Photo NASA/Hubble via reddit This can also be caused by dark matter! If the dark matter is clustered together and forms a really dense area in space, then the same effect can happen - the light is bent around the object! -- source link
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