* Spiral galaxies: These galaxies are characterized by their spiral arms, which are embedded within a flat, rotating disk of gas, dust, and stars.
* Lenticular galaxies: These galaxies, sometimes called "S0 galaxies", have a disk-like structure but lack prominent spiral arms. They often have a central bulge and a prominent disk.
While elliptical galaxies can have a faint, extended disk component, it is not as clearly defined as in spiral and lenticular galaxies.
Here's a quick breakdown:
* Spiral galaxies: Yes, they have a clearly defined disk component with spiral arms.
* Lenticular galaxies: Yes, they have a clearly defined disk component but lack spiral arms.
* Elliptical galaxies: Less clearly defined disk component, often faint and extended.
So, to summarize, spiral and lenticular galaxies are the types of galaxies with a clearly defined disk component.
