lenticular galaxies

     

A lenticular galaxy is a type of galaxy which is intermeiate between an elliptical galaxy and a spiral galaxy in galaxy morphological classification schemes. Lenticular galaxies are disc galaxies (like spiral galaxies) which have used up or lost their interstellar matter, therefore, very little star formation is thought to occur and they consist mainly of aging stars (like elliptical galaxies). The dust in most lenticular galaxies is generally found only near the nucleus and generally follows the light profile of the galaxies' bulges. Because of their ill-defined spiral arms, if they are inclined face-on it is often difficult to distinguish between them and elliptical galaxies.

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