论文标题
宇宙旅行者假设：使用自由浮动行星进行星际殖民化的外星文明
The Cosmic Hitchhikers Hypothesis: Extraterrestrial Civilizations Using Free-Floating Planets for Interstellar Colonization
论文作者
论文摘要
我提出了宇宙旅行者假设，如下所示。先进的外星文明可以使用自由浮动的行星作为星际运输，进行太空探索和星际殖民化。当他们骑自由浮动的行星触及，探索和殖民行星系统时，其生物物种，生物后物种和技术的大型或种群可能会成为宇宙搭便车者。为了获得星际骑行，宇宙旅行者可能会前往自由浮动的行星，通过他们的家园附近。否则，他们可能会使用天文工程将自由浮动的行星转向其家居行星系统。宇宙搭便车者也可以骑行其行星系统外部区域的物体，在天文工程弹出时，它们在渐近巨型分支的演化过程中会变成自由浮动的行星。在星际旅行期间，宇宙旅行者可以应用天文工程，将其自由浮动的行星转向其选择的行星系统。骑自由浮动的行星可能无法节省旅行时间，但它避免了星际航天器运输大量人群的技术挑战。宇宙旅行者的每个文明都可以定居几个行星系统。它的殖民地可能会变成自主文明，改变银河系中的文明数量。在过去的40亿年中，太阳系可能已经通过了宇宙搭便车者或其骑自由浮动行星的文物。因此，它们的文物可能存在于太阳系或我们恒星的社区中。 SETI和SETA应包括搜索宇宙搭便车者及其文物。关键字：SETI，SETA，自由浮动星球，外星文明，星际旅行，星际殖民，人工制品，宇宙搭便车者
I propose the Cosmic Hitchhikers hypothesis as follows. Advanced extraterrestrial civilizations may use free-floating planets as interstellar transportation for space exploration and interstellar colonization. Large groups or populations of their biological species, post-biological species, and technologies may become Cosmic Hitchhikers when they ride free-floating planets to reach, explore and colonize planetary systems. To get an interstellar ride, Cosmic Hitchhikers may travel to free-floating planets passing close by their home worlds. Otherwise, they may use astronomical engineering to steer free-floating planets toward their home planetary systems. Cosmic Hitchhikers may also ride objects native to the outer regions of their planetary systems, which become free-floating planets when ejected by astronomical engineering or by their stars during the asymptotic giant branch evolution. During interstellar travel, Cosmic Hitchhikers may apply astronomical engineering to steer their free-floating planets toward the planetary systems of their choice. Whereas riding free-floating planets may not save travel time, it avoids the technical challenges of interstellar spacecraft transporting large populations. Each civilization of Cosmic Hitchhikers may colonize several planetary systems. Its colonies may grow into autonomous civilizations, changing the number of civilizations in the Galaxy. Over the last 4 billion years, Cosmic Hitchhikers or their artifacts riding free-floating planets might have passed by the Solar System. Therefore, their artifacts might exist in the Solar System or in our stellar neighborhood. SETI and SETA should include the search for Cosmic Hitchhikers and their artifacts. Keywords: SETI, SETA, free-floating planet, extraterrestrial civilization, interstellar travel, interstellar colonization, artifact, Cosmic Hitchhikers
