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How to Characterize Habitable Worlds and Signs of Life
Annual Review of Astronomy and Astrophysics ( IF 33.3 ) Pub Date : 2017-08-18 , DOI: 10.1146/annurev-astro-082214-122238
Lisa Kaltenegger 1
Affiliation  

The detection of exoplanets orbiting other stars has revolutionized our view of the cosmos. First results suggest that it is teeming with a fascinating diversity of rocky planets, including those in the habitable zone. Even our closest star, Proxima Centauri, harbors a small planet in its habitable zone, Proxima b. With the next generation of telescopes, we will be able to peer into the atmospheres of rocky planets and get a glimpse into other worlds. Using our own planet and its wide range of biota as a Rosetta stone, we explore how we could detect habitability and signs of life on exoplanets over interstellar distances. Current telescopes are not yet powerful enough to characterize habitable exoplanets, but the next generation of telescopes that is already being built will have the capabilities to characterize close-by habitable worlds. The discussion on what makes a planet a habitat and how to detect signs of life is lively. This review will show the latest results, the challenges of how to identify an...

中文翻译:

如何表征宜居世界和生命迹象

对围绕其他恒星运行的系外行星的探测彻底改变了我们对宇宙的看法。初步结果表明,它充满了各种迷人的岩石行星,包括宜居带内的岩石行星。即使是离我们最近的恒星比邻星,在其宜居带比邻星 b 中也有一颗小行星。借助下一代望远镜,我们将能够窥视岩石行星的大气层并瞥见其他世界。使用我们自己的行星及其广泛的生物群作为罗塞塔石碑,我们探索了如何在星际距离上检测系外行星的宜居性和生命迹象。目前的望远镜还不足以表征宜居系外行星,但已经建造的下一代望远镜将有能力表征附近的宜居行星。关于什么使行星成为栖息地以及如何检测生命迹象的讨论很活跃。这篇评论将展示最新的结果,以及如何识别……的挑战。
更新日期:2017-08-18
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