This poster captures 25 of my favorite concentric ring galaxy candidates.
Galaxies can have many different types of rings – see
this poster for some examples. I have seen up to 2 closed rings in galaxies, an inner ring and an outer ring. But what about numerous (more than 2) concentric rings?
Scientists say that concentric ring formation is possible, but in my experience I have yet to see a galaxy with more than 2 truly concentric rings. This poster contains the galaxies which I have found to be closest to a true concentric ring pattern. But if you look closely, especially in the inverted view, you will see that almost all of the rings have a slightly spiral nature to them.
Dr. Arp included a category in his collection called Concentric Ring galaxies, but these were actually elliptical galaxies with shells from previous mergers. To me, these aren't really examples of concentric ring galaxies.
Each of the object images on this poster has been posted to my Astrobin account. The links to each individual image are below in case you wanted to see more detail and a description of each object:
My Favorites:
NGC 488NGC 7217NGC 521NGC 3147NGC 4699Oval But Nice:
NGC 7606NGC 5985NGC 7782NGC 5878NGC 3254Perhaps a Bit Too Flocculent:
NGC 2841NGC 3521NGC 3675NGC 7331NGC 2613Fewer, Wider Rings:
NGC 4698NGC 3898NGC 2775NGC 2196NGC 6340Only If You Squint:
NGC 2985NGC 3642NGC 1357NGC 6500NGC 1169All of the above objects are contained in my
Astrobin Concentric Ring Galaxy Collection.
If you enjoyed this compilation poster, please see my collection of 80 such posters
here. The collection includes posters such as
Superlong Tidal Tails,
Superthin Galaxies, and the
Brightest Galaxies Visible from the Northern Hemisphere. Most of these posters are contained in my
Deep Sky Compendium, for which I will release the next version later this year.
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