Here's a breakdown:

* Red Giant: A red giant is a star that has exhausted its hydrogen fuel in its core and has expanded significantly.

* White Dwarf: After a red giant sheds its outer layers, the remaining core collapses into a very dense, hot, and small star called a white dwarf. It is primarily composed of carbon and oxygen, and it no longer undergoes nuclear fusion.

* Density: White dwarfs are incredibly dense, packing the mass of our sun into a volume roughly the size of Earth.

* Cooling: White dwarfs gradually cool over billions of years, eventually becoming faint white dwarfs and then black dwarfs.

Let me know if you'd like to know more about white dwarfs!