Interesting object~ whats it called?

https://www.legacysurvey.org//viewer/?ra=348.6656&dec=-43.6050&layer=ls-dr9&zoom=11&GCs-PNe

what is this shadow thingy called?

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On first glance looks like an”empty” space in between the galaxy and…… that other thing :thinking:

A completely deformed galaxy caused by the spiral galaxy’s presence?

Hi,
I think that’s a “tidal stream” – what probably happened is that spiral galaxy on the left merged with a smaller galaxy, and the smaller one got torn apart; that faint glowing arc might be all that is left of its stars, or might be stars stripped off its outskirts.

Here’s an article about a similar galaxy:

Lots of different shell, stream, and umbrella shapes can happen with different merger geometries.

cheers,
dustin

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