1. Galaxy Identification Supplements
Introduction to Galaxy Classification
If you’re reading this without the homework text, then you’re doing it wrong!

2. By The original uploader was Cosmo0 at English Wikipedia(Original text: None given) - Transferred from en.wikipedia to Commons., Public Domain,

3. Elliptical Galaxy – M49
By Ole Nielsen - CC BY-SA 2.5,

4. Lenticular Galaxy – Spindle Galaxy
By HST - File:Ngc5866 hst big.jpg, Public Domain,

5. 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 - ([cdn.spacetelescope.org/archives/images/screen/heic0602a.jpg direct link])See also: CC BY 3.0,

6. Barred Spiral Galaxy – M91
By Jschulman555 - Own work, CC BY-SA 4.0,

7. Irregular Galaxy – M82
By NASA, ESA, and The Hubble Heritage Team (STScI/AURA) - ([cdn.spacetelescope.org/archives/images/screen/heic0604a.jpg direct link]) Public Domain,