A white dwarf is the final stage for many stars, including our Sun. It's a very dense, Earth-sized remnant of a star that has exhausted its nuclear fuel. There's nothing directly "after" a white dwarf in the life cycle of that particular star.

However, a white dwarf can experience a few different fates depending on its surroundings:

* Cooling and fading: Most white dwarfs will simply cool down over trillions of years, becoming black dwarfs – cold, dark objects.

* Accretion and supernova: If a white dwarf is in a binary system and accretes matter from its companion star, it can become unstable and explode as a Type Ia supernova.

* Merging with another white dwarf: Two white dwarfs orbiting close to each other can eventually merge. This can trigger a supernova or create a more massive white dwarf.

So, while a white dwarf is the final stage for a star like our Sun, it's not the end of the story for all stars.