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 evidence do we have for the change in the way stars orbit galaxies over time?

Explain the phenomenon observed in the Black Eye Galaxy regarding its gas and dust rotation.

What are lenticular galaxies and how do they differ from spiral and elliptical galaxies?