Scientist Proposes Moving Earth Farther from the Sun to Extend Human Survival by Billions of Years

A scientist has proposed an ambitious long-term plan that could one day help humanity survive the Sun’s inevitable evolution by gradually moving Earth farther away from the star. While the concept remains entirely theoretical, the research outlines how advanced future civilizations could use megascale engineering to preserve Earth’s biosphere for billions of years beyond its natural lifespan.

The proposal appears in a study accepted for publication in the Journal of the British Interplanetary Society, with a preprint also available on the scientific repository arXiv. In the paper, researcher Harry presents a detailed strategy for addressing some of the greatest long-term threats facing our planet.

According to the study, Earth may remain naturally habitable for only about one billion more years. As the Sun ages, it will gradually become brighter, causing global temperatures to rise dramatically. Over time, Earth’s oceans are expected to evaporate, the atmosphere could be stripped away, and life as we know it would become impossible. The researcher argues that, with sufficient technological advancement, humanity could potentially extend the planet’s habitability to approximately 9.1 billion years.

The proposal tackles several challenges associated with Earth’s distant future, including increasing solar radiation, the Sun’s eventual expansion into a red giant, the gradual shutdown of plate tectonics, the loss of water, changes in Earth’s rotation and axial tilt, and even the threat of asteroid and comet impacts.

One of the study’s most striking ideas is the construction of a giant sunshield measuring roughly 700,000 kilometres across. Positioned slightly beyond the Moon’s orbit, the shield would reduce the amount of solar radiation reaching Earth, helping to counter the Sun’s increasing brightness over billions of years.

The proposed structure would be made from an ultra-thin aluminium material similar to the protective sunshield used on the James Webb Space Telescope. Although only about 0.1 millimetres thick, the shield would still weigh an estimated one quadrillion kilograms (10¹⁵ kg). The researcher suggests that the required aluminium could be sourced from a tiny fraction of the Moon’s mass, while an enormous carbon cable needed to stabilize the structure could be produced using material extracted from the dwarf planet Ceres.

Blocking a significant portion of sunlight would also reduce the light and warmth reaching Earth, creating another major challenge. To address this, the study proposes harnessing Jupiter as an enormous energy source.

The researcher envisions placing fusion reactors deep within Jupiter’s atmosphere, where hydrogen and helium could be used as fuel. The energy generated would then be transmitted through relay stations and powerful lasers, effectively creating an artificial source of light and heat capable of sustaining Earth.

Perhaps the boldest aspect of the proposal involves physically changing Earth’s orbit.

As the Sun expands into a red giant several billion years from now, Earth would need to move farther away to avoid being consumed. The study suggests increasing Earth’s orbital distance from 1 astronomical unit (AU) to 1.2 AU, representing roughly a 20% increase in its distance from the Sun.

To accomplish this extraordinary feat, the researcher proposes extracting oxygen from Jupiter and converting it into a massive particle beam aimed at Earth. Over hundreds of years, the continuous force exerted by the beam would gradually push the planet into a wider orbit, allowing it to escape the most dangerous effects of the Sun’s expansion.

Although the proposal is far beyond current technological capabilities and remains purely theoretical, it offers an intriguing glimpse into how future civilizations might confront cosmic challenges that today appear unavoidable.

Rather than predicting an imminent solution, the study explores the limits of scientific imagination and engineering, demonstrating that the long-term survival of Earth’s biosphere may not be entirely impossible if humanity one day develops technologies capable of reshaping an entire planetary system.