Interesting interaction here

https://www.legacysurvey.org//viewer/?ra=357.6366&dec=2.0734&layer=hsc-dr3&zoom=13

It’s hard to tell whether the bright arc above this pair of galaxies (you need to go to the viewer to see it) is an artefact or a shell of ejected stars. Such widely dispersed shells of ejected stars have been seen in other interactions, but this is about the furthest one I have seen, so may not be real.

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looks to be an interaction/collisional shell from a previous encounter

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