5 billion years???Or 3 years???We're talking about ridiculous superstitions predicated on an ancient calendar ending on a certain date, I wasn't aware scientifically-backed chronologies were going to come into play.??
Edit: If, in 5 billion years or whenever, we have the technology to modify an entire planet's orbit in a way that is not so destabilizing that we eliminate the Earth's ability to support life, we could probably just have moved to another planet and simulated the sun's effects entirely xD