Which of the following types of galaxies have consumed or lost the majority of their interstellar matter?

Lenticular galaxies are disc galaxies that have consumed or lost the majority of their interstellar matter, leaving them with very little continuing star formation. However, they may retain a considerable amount of dust in their disks. As a consequence, they are mostly composed of old stars.

Asked by Vasilii Kulev · Last updated 4 years ago · 878 views · SOURCE