Glossary term: lenticular galaxy

Description: The word lenticular is used to describe objects that have a lens shape. Lenticular (S0 or SB0) galaxies have observational features of both spiral and elliptical galaxies. Lenticular galaxies appear to have a disk and central bulge similar to spiral galaxies but no noticeable spiral arms, they also primarily also contain very old stars, like those found in elliptical galaxies. The formation process of lenticular galaxies is still a subject of research; however, there is some evidence that they result from the interaction between galaxies.

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Term and definition status: This term and its definition is still awaiting approval

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