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cover of episode Meet The ‘Planet Hunter’ Searching For Alien Life, with Jacob Bean

Meet The ‘Planet Hunter’ Searching For Alien Life, with Jacob Bean

2025/5/15
logo of podcast Big Brains

Big Brains

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Jacob Bean
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专注于电动车和能源领域的播客主持人和内容创作者。
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Jacob Bean: 我认为寻找外星生命的关键在于研究系外行星的大气层。通过分析大气层的成分和厚度,我们可以推断行星的表面温度和是否存在液态水,这是生命存在的必要条件。詹姆斯·韦伯太空望远镜在这方面具有强大的能力,它可以通过光谱学技术分析行星大气中的化学物质,寻找生命存在的迹象,例如氧气。当然,发现氧气并不一定意味着存在复杂的生命,但它仍然是一个非常令人兴奋的发现,值得我们进一步研究。我对宇宙海岸线理论深信不疑,它解释了为什么有些行星有大气层,而有些行星没有。我参与发现的Gliese 486b行星没有大气层,这符合宇宙海岸线理论的预测,也指导我们接下来应该研究哪些行星。虽然寻找外星生命是一个充满挑战的过程,但我对未来充满希望,期待着下一代望远镜的出现,它们将帮助我们更详细地了解系外行星,甚至直接对行星进行成像,探测生命存在的迹象。

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The search for life beyond Earth is no longer science fiction—it takes a lot of data, powerful telescopes and a bit of cosmic detective work. And at the center of this search is University of Chicago astrophysicist Jacob Bean. Bean was part of the team that made history by detecting carbon dioxide in the atmosphere of a distant planet using the James Webb Space Telescope—a major step forward in our ability to study exoplanets.

Bean uses cutting-edge tools and discoveries that are reshaping how we think about planet habitability, biosignatures and our place in the universe. From potentially habitable exoplanets like K2-18b to false hopes like Gliese 486b, Bean shares why the atmospheres of these faraway worlds might hold the key to one of humanity’s oldest questions: Are we alone in the universe?