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Measuring the Universe 在線電子書 pdf 下載 txt下載 epub 下載 mobi 下載 2024

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Johnson, G. 作者

W W Norton & Co Inc

譯者

2005-6 出版日期

256 頁數

$ 25.93 價格

HRD

叢書系列

9780393051285 圖書編碼

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發表於2024-09-17

Measuring the Universe 在線電子書 epub 下載 mobi 下載 pdf 下載 txt 下載 2024

Measuring the Universe 在線電子書 epub 下載 pdf 下載 mobi 下載 txt 下載 2024

Measuring the Universe 在線電子書 pdf 下載 txt下載 epub 下載 mobi 下載 2024

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Measuring the Universe 在線電子書 pdf 下載 txt下載 epub 下載 mobi 在線電子書下載

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How big is the universe? In the early twentieth century, scientists took sides. One held that the entire universe was contained in the Milky Way galaxy. Their champion was the strong-willed astronomer Harlow Shapley. Another camp believed that the universe was so vast that the Milky Way was just one galaxy among billions the view that would prevail, proven by the equally headstrong Edwin Hubble. Almost forgotten is the Harvard Observatory "computer" a human number cruncher hired to calculate the positions and luminosities of stars in astronomical photographs who found the key to the mystery. Radcliffe-educated Henrietta Swan Leavitt, fighting ill health and progressive deafness, stumbled upon a new law that allowed astronomers to use variable stars those whose brightness rhythmically changes as a cosmic yardstick. Miss Leavitt's Stars is both a masterly account of how we measure the universe and the moving story of a neglected genius

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