The Sun Is Going to Get Bigger Every Billion Years

The sun lasts around ten billion years, and it's about five billion years into that life cycle. It's going to burn happily for a few more billion but near the end of its life, in a few billion years, it's going to start to expand nd. Mo tata, big. That's a big difference. I was looking forward to aad diing of heat. No, every billion years. It's very gentle and t's very gradual. But you know, if, like josephine, you are planning for the very far future survival of the human race, it's something you do need to take into account as you build your planetary defense system.