AI 中文总结
研究在太阳寿命终结后维持地球宜居性的问题，提出一系列巨型工程概念防范多种威胁，实施这些措施可使地球保持宜居长久，相比其他选择有诸多优势，是更具吸引力的长期生存策略。
AI 中文摘要
地球很罕见，大规模星际旅行可能不可行，未来地球上的文明可能不得不留下。然而，若不加以控制，地球当前的宜居性将在十亿年后终结。本文研究并概念化了一系列巨型工程概念，以防范对地球宜居性的七种长期威胁，包括太阳光度、太阳吞噬、板块运动终结、水分流失、倾角和自转、物体碰撞以及系外威胁。实施和维护这些保障措施可使地球保持宜居910万亿年。通过提升和移动太阳光球质量，这一期限可提高一个数量级。与其他选择相比，这些保障措施具有更大可行性、更低能源生产需求率以及利用经济上可行的太空采矿基础设施等优势，可能是留在地球更具吸引力的长期生存策略。
英文摘要
The Earth is rare and large-scale interstellar travel may be unfeasible - instead of migrating to other solar systems, future civilisations on Earth may have to remain. However, left unchecked, the Earth's current habitability will end in one billion years. This paper investigates and conceptualises a set of megaengineering concepts required to safeguard against seven long-term threats to Earth's habitability: solar luminosity, solar engulfment, the end of tectonics, water loss, obliquity and rotation, object collision, and extra-system threats. Implementing and maintaining the set of safeguards would allow the Earth to remain habitable for 9.1 million billion years. This could be raised by an order of magnitude via lifting and moving solar photospheric mass. Compared with alternatives, advantages of the safeguards such as greater feasibility, lower requisite rate of energy production, and utilisation of economically viable space mining infrastructure may present remaining on Earth as a more attractive long-term survival strategy.
Comments14 pages, 3 figures. Version 2 (9th August 2026) - edited sunshade composition from aluminium to alumina fabric; added Birch orbital ring for mass lifting from Jupiter
Journal refPublished by the Journal of the British Interplanetary Society, 13th July 2026
