Stars all have life cycles: the sun will become a white dwarf, does that planet have a 'lifetime'?

According to our current observations, there are at least 2 trillion galaxies in this universe. Then we know that a galaxy is composed of super many star systems. A star system is made up of many planets. Therefore, the celestial bodies in this universe all have their own orbits. In this case, the cosmic environment can guarantee a stable and safe state. However, this universe is not so stable and safe, because in this vast universe, there are still many dangers.

For example, there are some restless comets, or asteroids that are out of orbit, which are one of the dangerous objects in this universe. There is also the "unfathomable" black hole that can absorb all the matter in this universe. However, these things seem to be far away from our earth. In fact, there is a dangerous object that exists near our earth, and it is evolving into a dangerous state. That is the main star of our solar system, the sun. Because the sun is a star, and stars all have life cycles, the sun will become a white dwarf, does the planet have a "life"?

The sun is currently in the "young adult" main sequence period, but in about 5 billion years, the sun will become a white dwarf. Then in this process, the sun will experience a "middle-aged" red giant period. Then during this period, the mass of the sun will slowly decrease due to the consumption of the hydrogen element above, and the gravitational force will also decrease. At this time, the hydrogen element outside the sun will run outside because there is no gravity. The volume of the sun will expand, and if at that time, if our earth does not escape the solar system before the sun's gravity becomes smaller, it will be swallowed by the hydrogen ocean on the sun that is undergoing nuclear fusion reactions, and we humans will be in this situation. down to extinction.

And this is only something that stars with the mass of the sun will experience. If the mass of the stars is more than 20 times the mass of the sun, they will have two results. One is a supernova explosion and become a neutron star. Another situation is that a supernova explosion occurs, but it eventually becomes a black hole. And for planets like Earth, their lifespans change with the stars. But if a single planet does not exist around any stars, if nothing else, it can exist forever in this universe.