论文标题
通过掠夺小行星在地球和金星之间的生命转移
Transfer of Life Between Earth and Venus with Planet-Grazing Asteroids
论文作者
论文摘要
最近，在金星大气中发现了磷酸作为潜在的生物签名。这就提出了一个问题：如果维纳斯人的生活存在，它可能与陆地生活有关吗？根据已知的对地球影响的已知速率，我们表明至少$ \ sim 6 \ times 10^5 $小行星在没有显着加热的情况下放牧了地球的大气层，后来影响了金星，并且类似的数量掠夺了维纳斯的大气层，后来在$ \ sim 10^5 $ $ $ $ \ $ \ sim 10^5美元中都能在其上生存下来，在此期间均可在Microbes中享受。尽管尚不清楚陆地上的丰富陆地寿命，但这些行星放牧的牧羊人可能能够在地球和金星大气之间转移微生物生命。结果，可能的金星生活的起源可能与陆地生活根本没有区别。
Recently, phosphine was discovered in the atmosphere of Venus as a potential biosignature. This raises the question: if Venusian life exists, could it be related to terrestrial life? Based on the known rate of meteoroid impacts on Earth, we show that at least $\sim 6 \times 10^5$ asteroids have grazed Earth's atmosphere without being significantly heated and later impacted Venus, and a similar number have grazed Venus's atmosphere and later impacted the Earth, both within a period of $\sim 10^5$ years during which microbes could survive in space. Although the abundance of terrestrial life in the upper atmosphere is unknown, these planet-grazing shepherds could have potentially been capable of transferring microbial life between the atmospheres of Earth and Venus. As a result, the origin of possible Venusian life may be fundamentally indistinguishable from that of terrestrial life.
