Its a fact that everything has a cycle of life and death, and our Sun is no exception. Around 6 billion years from now the Suns core will become unstable and collapse under its own weight. When that happens it will grow in size, entering its red giant phase, and engulf Mercury and Venus, the planets closest to the Sun. Theres a high probability that Earth will share the same fate, but even if that doesnt happen, the growing heat from the newly formed giant will scorch the planet, purging it from any form of life and effectively making it inhabitable. There will be a third stage of the Suns death as well, where it will burn out its fuel completely, and start blowing of fractions of its atmosphere into space in the form of pulses. When that is done, all that will remain will be the core, a white dwarf star thatll slowly cool off, and the cycle will be complete. Contrary to popular belief our Sun will never go Supernova. That only happens to stars that have at least 8-10 times the mass of our own. If our star had a mass like that, when the core finally collapsed under its weight, instead of expanding into the red giant, a Supernova would occur. A huge explosion with the force to blow away every planet in the solar system, this devastating occurrence would shine brighter than a galaxy.
