arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.00105astro-ph.EPastro-ph.IMphysics.pop-ph
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金星生命方程式

The Venus Life Equation

Noam R. Izenberg, Diana M. Gentry, David J. Smith, Martha S. Gilmore, David Grinspoon, Mark A. Bullock, Penelope J. Boston, Grzegorz P. Slowik

摘要:

古代金星和地球在生命发展的关键方面可能是相似的,例如液态水海洋,陆地-海洋界面,有利的化学成分和能量途径。如果生命曾经在早期的金星上发展,或者从其他地方被运送到早期的金星上,它可能会蓬勃发展,扩张,然后在导致今天金星上不适合居住的表面的变化中幸存下来。金星云层可能为现存的生命提供了一个避难所,这些生命从更早的更适合居住的表面环境中存活下来。我们介绍了金星生命方程-一种基于理论和证据的方法来计算金星L上现存生命的概率,使用生命的三个主要因素:起源,鲁棒性和连续性,或L = O x R x C。我们使用我们目前对地球和金星环境条件的理解来评估这些因素中的每一个。我们发现,金星上的生命起源的概率将是类似的地球,并认为其他因素应该是非零的,在太阳系的其他有前途的天体生物学目标相比。金星生命方程还确定了对金星知之甚少的方面,这些方面可以通过未来的探索任务直接观测来解决。

英文摘要:

Ancient Venus and Earth may have been similar in crucial ways for the development of life, such as liquid water oceans, land-ocean interfaces, favorable chemical ingredients and energy pathways. If life ever developed on, or was transported to, early Venus from elsewhere, it might have thrived, expanded and then survived the changes that have led to an inhospitable surface on Venus today. The Venus cloud layer may provide a refugium for extant life that persisted from an earlier more habitable surface environment. We introduce the Venus Life Equation - a theory and evidence-based approach to calculate the probability of extant life on Venus, L, using three primary factors of life: Origination, Robustness, and Continuity, or L = O x R x C. We evaluate each of these factors using our current understanding of Earth and Venus environmental conditions from the Archaean to the present. We find that the probability of origination of life on Venus would be similar to that of the Earth and argue that the other factors should be nonzero, comparable to other promising astrobiological targets in the solar system. The Venus Life Equation also identifies poorly understood aspects of Venus that can be addressed by direct observations with future exploration missions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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