Circle or Spiral arm?

Is this a circle in the middle or just a spiral arm?

Posted November 15, 2016 8:45 PM

by Budgieye moderator

Well, to me it looks like a circle, a ring. Galaxies sometimes have inner and outer rings.For pictures of rings, see

2.4 Ring galaxy (empty in the middle) collisional ring galaxy - created by collision that removed the inside of the galaxy) http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=2&comment_id=53d8b8340d43f77bd6000ffd

2.5 ringed galaxy (ring around a galaxy) and pseudo-ringed galaxy, created by resonance created by bars , nuclear rings http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=2&comment_id=53d8b864db90c70a2a000be2

Posted November 16, 2016 10:24 PM

Thank you for your help Budgieye!

Posted November 17, 2016 8:49 AM