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Incredible Hubble Image Reveals a Bizarre Galaxy 'Mirror'

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发表于 2022-7-25 15:18:07 | 显示全部楼层 |阅读模式



There's something very odd about this image from the slot Hubble Space Telescope. If you look closely, you can see two almost-mirror image, orange-colored galaxies, seemingly connected by a long filamentFascinatingly, that's not two galaxies at all, but one, named SGAS J143845+145407. It just appears to be two,

thanks to the way the gravity of a massive object (or objects, like a cluster of galaxies) distorts the space that distant light travels through.Imagine putting a heavy weight on a trampoline, where the weight represents the galaxy cluster, and the trampoline mat represents space-time. Now roll some marbles from one side of the trampoline to the other.

Their normally 'straight' paths will seem to curve along different paths, not unlike rays of light through distorted space. Called gravitational lensing, this quirk of gravity can be used to magnify the light of background galaxies that would be too distant to otherwise see in much detail, as illustrated in the diagram below.

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