标题： 过去、现在和未来能够将地球视为凌日系外行星的恒星 显示英文标题

标题： Past, Present and Future Stars that can see Earth as a Transiting Exoplanet

摘要： 在宇宙中寻找生命的过程中，凌日系外行星目前是我们最好的目标。 在宇宙中寻找生命的过程中，凌日系外行星目前是我们最好的目标。 已有数千颗被发现，随着即将问世的大望远镜，我们的搜索正进入一个全新的发现时代，这些望远镜将寻找凌日世界大气中的生命迹象。 然而，宇宙是动态的，太阳邻域中哪些恒星能够从地球作为凌日行星的角度观测到并识别其充满活力的生物圈，自早期人类文明以来一直未知。 在这里，我们表明，在326光年以内有1715颗恒星处于正确的位置，自早期人类文明以来已经观察到了凌日地球上的生命，另有319颗恒星将在未来5000年内进入这个特殊的观测位置。 这些恒星中包括7颗已知的系外行星宿主，它们具备观测地球凌日的视角，包括罗斯-128，它在过去曾观测到地球凌日，特加登星以及特拉普斯特-1，它们分别将在29年和1642年后开始观测地球凌日。 我们发现，人造无线电波已经覆盖了我们列表中75颗最近的恒星。 显示英文摘要

摘要： In the search for life in the cosmos, transiting exoplanets are currently our best targets. In the search for life in the cosmos, transiting exoplanets are currently our best targets. With thousands already detected, our search is entering a new era of discovery with upcoming large telescopes that will look for signs of life in the atmospheres of transiting worlds. However, the universe is dynamic, and which stars in the solar neighborhood have a vantage point to see Earth as a transiting planet and can identify its vibrant biosphere since early human civilizations are unknown. Here we show that 1,715 stars within 326 light-years are in the right position to have spotted life on a transiting Earth since early human civilization, with an additional 319 stars entering this special vantage point in the next 5,000 years. Among the stars are 7 known exoplanet hosts that hold the vantage point to see Earth transit, including Ross-128, which saw Earth transit in the past, Teegarden's Star, and Trappist-1, which will start to see Earth transit in 29 and 1,642 years, respectively. We found that human-made radio waves have swept over 75 of the closest stars on our list already.