This is an excellent example of the subtype dubbed Sc(s) in the de Vaucouleurs extension of Hubble's galaxy classification, in which the arms arise in a spiralling pattern from the nuclear region itself rather than from a surrounding ring. I heartily recommend viewing the Gemini-North image to appreciate the wonderful structure of NGC 628. This image was taken on June 20, 2003, when the type II supernova 2003gd was bright; that's it almost due south of the nucleus in the bright spiral arm 2/3 of the way to the bottom of the image.
I tried this one on two successive nights from the Lowell Observatory 1.1-m, with the comparison giving a good example of average versus poor atmospheric seeing.
Last changes: 7/2003 © 2001-3