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Which is the nearest spiral barred galaxy undergoing interaction, other than M31 (Andromeda) and our own Milky Way galaxy?

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This is most likely NGC 55, which is interacting weakly with NGC 300. NGC 55 is described as a Magellanic type barred spiral galaxy.

This answer assumes that you ignore the Large Magellenic Cloud itself, which is a barred spiral galaxy and is interacting with the Milky Way.

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  • $\begingroup$ Another possible candidate is M33, which is more of a classical spiral galaxy than the LMC, though not everyone is sure it's barred. $\endgroup$ Apr 29, 2023 at 10:18

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