Here's how the story goes for the Sun and our solar system:
* The Sun's Life: The Sun is a star, and like all stars, it has a finite lifespan. It will eventually run out of fuel and die. This will take billions of years.
* Sun's Future: In about 5 billion years, the Sun will become a red giant, expanding to engulf Mercury, Venus, and likely Earth. After that, it will shed its outer layers and become a white dwarf, a small, dense, and extremely hot remnant of its former self.
* Planets' Fate: The planets will likely be disrupted by the Sun's expansion and eventual contraction. Their fates are uncertain, with some possibilities being complete destruction, ejection from the solar system, or becoming part of a debris disk around the white dwarf.
So, while the Sun and our solar system won't disappear overnight, they will eventually go through a dramatic transformation. But this process will take billions of years.