Scientist's Wild Plan Could Save Earth for Trillions of Years

What if humanity could stay on Earth forever, even after the Sun burns out?

Independent researcher Gabriel Harry thinks it's possible. His paper, recently accepted for publication in the Journal of the British Interplanetary Society, outlines a daring vision to keep our planet habitable for another 9.1 million billion years.

The challenge is real. In about five billion years, our Sun will run out of hydrogen fuel and expand into a red giant. It will either swallow Earth entirely or push it away, ending all life as we know it.

Harry's solution starts with blocking the deadly heat. He proposes building a massive sunshade at Lagrange point 1, a gravitational sweet spot between Earth and the Sun. The shade would need to be roughly 434,000 miles in radius, connected to a carbon tether stretching 1.2 million miles.

To replace the Sun's warmth, fusion reactors would dive 4,000 miles deep into Jupiter's atmosphere. These reactors would beam energy back to Earth via laser, keeping our planet warm and cozy.

Moving Earth away from the dying Sun requires even more creativity. Harry suggests redirecting an asteroid to fly close to Earth's surface a million times. Each pass would use gravitational forces to gradually push our planet into a safer orbit.

That distance creates its own problem. Earth's tectonic activity and nutrient cycles would stop. Harry's fix involves sinking about four pounds of antimatter into Earth's core every day to keep our planet's inner engine running.

Fast forward another few billion years, and the Andromeda galaxy will collide with our Milky Way. Harry proposes firing a beam of hydrogen near the Sun's pole to create another gravitational slingshot, moving our entire solar system out of harm's way.

The Bright Side: Harry's plan would require a million times less energy than traveling to another star system or terraforming a new planet. Staying put on the planet where life has thrived for four billion years turns out to be the most efficient option.

The timeline is mind boggling. With these safeguards in place, Earth could remain comfortable and habitable until the last stars fade out in a hundred trillion years.

Harry admits his vision is extremely far fetched. But it's more than science fiction. It's a thought experiment that shows how deeply humans can think about our species' survival.

The beauty of staying home might be worth any challenge we face along the way.