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cover of episode Henrietta Leavitt and the end of the universe

Henrietta Leavitt and the end of the universe

2023/1/18
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Unexplainable

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布莱恩·雷斯尼克
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节目主持人:本节目讲述了亨丽埃塔·勒维特对天文学的巨大贡献,以及她的发现如何改变了我们对宇宙的理解。从哈佛大学在19世纪90年代开展的绘制南天星空的项目,到勒维特对造父变星的观测和发现,再到哈勃利用勒维特的发现确认了其他星系的存在并发现宇宙正在膨胀,最终引出了对宇宙最终命运的探讨,包括热寂和宇宙大撕裂两种可能性。勒维特的工作为后来的天文学家提供了重要的基础,推动了宇宙学的发展,尽管她本人没有获得诺贝尔奖,但她对科学的贡献是不可磨灭的。 布莱恩·雷斯尼克:勒维特的发现为天文学家提供了一种测量宇宙距离的“宇宙标尺”,这使得科学家能够测量宇宙的距离,并由此发现了其他星系的存在。哈勃利用勒维特的发现,确认了仙女座星系的存在,并证明了它位于银河系之外。哈勃的观测表明宇宙正在膨胀,这颠覆了此前认为宇宙静止不变的观点。宇宙膨胀的发现促使科学家们思考宇宙的起源,并最终发展出了大爆炸理论。20世纪90年代的观测表明宇宙的膨胀速度正在加快,这暗示了暗能量的存在。暗能量是导致宇宙加速膨胀的未知因素,它最终将导致宇宙的终结,可能的结局包括热寂和宇宙大撕裂。对宇宙的测量是理解宇宙的关键,即使是最简单的测量也能带来非凡的发现。

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Henrietta Leavitt's discovery of a way to measure distances to faraway stars revolutionized astronomy, leading to insights about the universe's expansion and eventual end.

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In the early 1900s, Henrietta Leavitt made one of the most important discoveries in the history of astronomy: a yardstick to measure distances to faraway stars. Using this tool, scientists eventually transformed our understanding of the universe. They realized space was expanding, that this expansion was accelerating, and that ultimately, everything will end.

This episode originally ran on June 30, 2021.

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