The sun won't explode in the way that you might imagine, like a giant supernova. It will, however, eventually die, and the process will be dramatic and have significant consequences for Earth. Here's a breakdown:

What will happen:

* Red Giant Phase: In about 5 billion years, the sun will run out of hydrogen fuel in its core. It will then begin fusing helium, expanding dramatically and becoming a "red giant". At this stage:

* The sun will engulf Mercury and Venus, and possibly Earth.

* Earth's surface will become uninhabitable due to the intense heat and radiation.

* Planetary Nebula: After a few million years, the sun's outer layers will be shed, forming a beautiful, glowing cloud of gas called a planetary nebula.

* White Dwarf: The remaining core will collapse into a dense, hot, and very small object called a white dwarf. This white dwarf will slowly cool over billions of years, eventually becoming a dark, cold stellar remnant.

Key points:

* No immediate threat: The sun is not close to exploding in a supernova, which requires a much larger star.

* Earth's fate is uncertain: Whether Earth will be engulfed by the sun during the red giant phase is a matter of ongoing scientific debate.

* A long time off: The sun's death is a process that will take billions of years, so there's no need to worry about it right now.

In short, the sun's death will be a gradual process that will eventually transform our solar system dramatically. While Earth likely won't be habitable long before the sun dies, it's a process that will unfold over billions of years.