AI Insight
As the sun ages over the next billion years, it will expand into a red giant, destroying Earth's atmosphere and oceans before eventually becoming a dim white dwarf. Eventually, in approximately a hundred trillion years, the galaxy will exhaust its ability to form new stars, leaving the universe dark. The article suggests that theoretical safeguards could be built to allow life to survive these cosmic changes without leaving Earth.
Why it matters
This analysis explores extremely long-term survival strategies for life on Earth, pushing the boundaries of speculative engineering and cosmology. While not immediately practical, it encourages thinking about civilization's ultimate future and the theoretical limits of planetary survival.
Understand the Science
In a billion years, the sun will start to run out of fuel and expand to become a red giant. Earth’s oceans and atmosphere will be burned away, and Earth will likely be engulfed by the sun altogether. The sun will then shrink to a dim white dwarf, and all light and warmth in the solar system will diminish. In a hundred trillion years, the galaxy’s ability to produce stars will be exhausted, and everything will turn dark. However, there’s a way for life to escape this fate—and what’s more, we wouldn’t need to leave the planet to do it. We just need to build some safeguards.