I was watching a video. The video is this https://www.kidzsearch.com/watch?v=QsKrMmlrG3c
He was playing a space simulator known as Universe Sandbox 2. He was trying to show us what will happen to our sun in 12 billion years. This is what happen, the sun started to expand. When the sun was like 4 or 5 billion years old the water on Earth will evaporate killing all life on Earth.At that time Mars will be habitable.
In 6 billion years the sun got more hotter. In 7 billion years the sun starts to cool down. In 10 or 12 billion years the sun will turn in to blue dwarf. All the planets survive but not life on Earth.Earth then starts to get colder and then stop orbiting the sun but then it will come back.
But what I am wondering is is that true and will all the planets really survive