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In every picture we see that galaxies are spiral, why so? are there any other shapes possible?

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  • $\begingroup$ Welcome to physics.SE! Have you checked online, e.g. en.wikipedia.org/wiki/Galaxy ? $\endgroup$
    – Vangi
    Commented Jun 12, 2019 at 19:12
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    $\begingroup$ Not every picture of a galaxy is spiral. There are elliptical galaxies out there. $\endgroup$
    – Kyle Kanos
    Commented Jun 12, 2019 at 19:31

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Yes, other shapes are possible. For example, here is a picture from NASA of M87, an elliptical galaxy:

enter image description here

It doesn’t look spiral at all.

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  • $\begingroup$ Minor quibble: that picture is from the Canada-France-Hawaii Telescope, not from NASA. $\endgroup$
    – Peter Erwin
    Commented Oct 1, 2021 at 18:21

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