Galaxy Identification Supplements Introduction to Galaxy Classification If you’re reading this without the homework text, then you’re doing it wrong!
By The original uploader was Cosmo0 at English Wikipedia(Original text: None given) - Transferred from en.wikipedia to Commons., Public Domain, https://commons.wikimedia.org/w/index.php?curid=3591173
Elliptical Galaxy – M49 By Ole Nielsen - http://www.ngc7000.org/ccd/gal-virgocluster.html#m49, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=1188643
Lenticular Galaxy – Spindle Galaxy By HST - File:Ngc5866 hst big.jpg, Public Domain, https://commons.wikimedia.org/w/index.php?curid=4378344
Spiral Galaxy – Pinwheel Galaxy By Credit:Image: European Space Agency & NASAAcknowledgements:Project Investigators for the original Hubble data: K.D. Kuntz (GSFC), F. Bresolin (University of Hawaii), J. Trauger (JPL), J. Mould (NOAO), and Y.-H. Chu (University of Illinois, Urbana)Image processing: Davide De Martin (ESA/Hubble)CFHT image: Canada-France-Hawaii Telescope/J.-C. Cuillandre/CoelumNOAO image: George Jacoby, Bruce Bohannan, Mark Hanna/NOAO/AURA/NSF - http://www.spacetelescope.org/news/html/heic0602.html ([cdn.spacetelescope.org/archives/images/screen/heic0602a.jpg direct link])See also: http://hubblesite.org/newscenter/newsdesk/archive/releases/2006/10/image/a, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=36216331
Barred Spiral Galaxy – M91 By Jschulman555 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=37847926
Irregular Galaxy – M82 By NASA, ESA, and The Hubble Heritage Team (STScI/AURA) - http://www.spacetelescope.org/images/heic0604a/ ([cdn.spacetelescope.org/archives/images/screen/heic0604a.jpg direct link])http://hubblesite.org/gallery/album/entire_collection/pr2006014a/, Public Domain, https://commons.wikimedia.org/w/index.php?curid=797295