The key to weird-looking and repeating galaxies is a phenomenon first predicted by Albert Einstein over 100 years ago.
emerges from the effect that objects with mass have on the fabric of space and time, united as a single entity called space-time.
and galaxy clusters causing an extreme warping of space-time. This effect gets really interesting when light from a background object, like a star or a galaxy, passes this warp. Light travels in straight lines, apart from when the space it is traveling through is warped. The warping of space by mass causes light from a distant source to"bend.
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