“In 5 billion years’ time, our star will be dying...By that time, Earth will be long gone, burnt to a crisp”
Hey, they can’t do that. It screws up all my plans!
And it won’t make a bit of difference whether you drove an SUV or a Prius, now will it?......................
Actually, we had better HOPE they are right. We actually know relatively little about how stars work.
We don’t know if the Sun will stay stable 5 billion years or 5 more seconds.
We can take good guesses, compare to other similar stars, and hope, but, if we don’t start moving life off this rock and find some new rocks to live on, the show is over.
Sounds negative, yes, but, stars don’t always play by the rules, and we are totally dependent on the one we have.
Read about this star: Delta Scorpius
https://en.wikipedia.org/wiki/Delta_Scorpii
It was thought to be a nice stable star until 2000.