Definition
A white dwarf star is essentially the core remnant of a star that has burned through all its nuclear fuel and collapsed into a very dense state. Think of it as the stellar equivalent of a dying ember – still radiating heat and light, but slowly fading away 🌟. It's incredibly compact, packing the mass of our sun into a sphere the size of Earth. Unlike larger stars that explode in supernovae, white dwarfs gradually cool over billions of years. It's like the quiet retirement of a once-powerful celebrity.