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A 'Follow the Energy' Approach for Astrobiology

机译:天体生物学的“跟随能量”方法

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A key challenge in astrobiology is to comprehend life and its interaction with the environment at a level sufficiently fundamental to embrace the alternative biochemistries that may be encountered in a search for life elsewhere (Baross et at, 2007). Life on Earth presents us with a single (albeit highly diversified) biochemical model around which to build this comprehension. This model is extremely valuable in providing an empirical starting point for understanding metabolic potential and environmental tolerance, and as a continuing "reality check" on whatever generalized concepts of life may be developed. Reference to this single example, however, also carries the risk of narrowing our sense of possibility-of leading us to define biochemistry, habitability, and biosignatures in terms so specific that they may exclude different forms of life.
机译:天体生物学的一个关键挑战是在足够基本的水平上理解生命及其与环境的相互作用,以涵盖寻找别处生命时可能遇到的替代生物化学(Baross等,2007)。地球上的生命为我们提供了一个单一的(尽管高度多样化)生化模型,围绕该模型可以建立这种理解。该模型在提供经验起点来理解代谢潜力和环境耐受性以及作为对可能发展的任何广义生命概念的持续“现实检查”方面具有极其重要的价值。但是,引用此示例,还可能会缩小我们的可能性意识-导致我们以特定的术语来定义生物化学,可居住性和生物特征,以至于它们可能排斥不同形式的生活。

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