Published in "The World of Galaxies", eds. Harold G. Corwin, Jr. and Lucette Bottinelli, 1989

For a postscript version of the article, click here.

Abstract. A brief discussion of the de Vaucouleurs revised Hubble classification system is given, with special emphasis on ring and lens morphologies. The possible physical interpretations of each dimension of the system are summarized.

Table of Contents

• INTRODUCTION
• THE REVISED HUBBLE CLASSIFICATION SYSTEM (RHS)
• EXTENSIONS AND ADDITIONS
• Rings and Pseudo-Rings
• Lenses
• PHYSICAL INTERPRETATIONS OF REVISED HUBBLE CLASSIFICATIONS
• CONCLUSIONS
• REFERENCES