Sunshade, Jovian Fusion and a New Orbit: A 9.1‑Quadrillion‑Year Plan for Earth

A speculative arXiv preprint outlines a megaproject to keep Earth habitable for 9.1 quadrillion years: build a 435,000‑mile sunshade just outside the Moon’s orbit to block the Sun, mine Moon and Ceres for materials to anchor a vast tether, and power an artificial Sun via fusion reactors in Jupiter beamed to Earth; to avoid the Sun’s red giant engulfment, Earth would be nudged outward to about 1.2 AU, with additional safeguards addressing tectonics, water loss and other cosmic threats. The concept remains theoretical and unproven.