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I'm looking to make a digital model of the local group of galaxies and I can't find a good representation of the Andromeda galaxy from a top-down view.

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Andromeda galaxy is inclined at about 77 degrees to us (where 90 degrees would be edge on) which makes it hard to reconstruct how it would look from 0 degrees. However there are various "artistic interpretations"

enter image description here

I found this one as part of the Space Engine planetary Database Wiki page of about the Andromeda galaxy. It doesn't claim to be a "scientific" reconstruction, but it might suffice for your needs.

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  • $\begingroup$ I don't see the bar or the 10-kpc ring, so I'd say "not very scientific"... $\endgroup$ Commented Apr 4 at 21:38
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Previous answers are good. The thing is, Andromeda should be just very similar to the Milky Way is terms of its overall appearance so I guess you could use just whatever face-on representation of a late-type massive spiral galaxy you can find. Note that we have less info about the Milky Way's overall appearance than for Andromeda since we are inside of it. Maybe I would just get something from hydrodynamical cosmological galaxy-formation simulations like FIRE, Illustris, or EAGLE. Here are examples from FIRE and EAGLE simulations.

FIRE EAGLE

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