How Do Galaxies Rotate?

The video explores how galaxies rotate, debunking the misconception that they spin like solid objects. It explains the role of density waves in maintaining spiral arms and discusses the influence of dark matter on galaxy rotation. The video also highlights unique galaxies with unusual rotational patterns and provides an overview of elliptical and lenticular galaxies, noting their characteristics and star formation processes.

What new insight or understanding did you gain from this video?