Helwan Observatory Bulletins PDF Download

Author: Ḥulwān (Egypt) al-Marsad
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 374

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Author: Lick Observatory
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 236

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Author: Flagstaff (Ariz.). Lowell Observatory
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 398

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Author: Charles W. J. Withers
Publisher: Harvard University Press
ISBN: 0674088816
Category : History
Languages : en
Pages : 334

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Space and time on earth are regulated by the prime meridian, 0°, which is, by convention, based at the Royal Observatory, Greenwich. But the meridian’s location in southeast London is not a simple legacy of Britain’s imperial past. Before the nineteenth century, more than twenty-five different prime meridians were in use around the world, including Paris, Beijing, Greenwich, Washington, and the location traditional in Europe since Ptolemy, the Canary Islands. Charles Withers explains how the choice of Greenwich to mark 0° longitude solved complex problems of global measurement that had engaged geographers, astronomers, and mariners since ancient times. Withers guides readers through the navigation and astronomy associated with diverse meridians and explains the problems that these cartographic lines both solved and created. He shows that as science and commerce became more global and as railway and telegraph networks tied the world closer together, the multiplicity of prime meridians led to ever greater confusion in the coordination of time and the geographical division of space. After a series of international scientific meetings, notably the 1884 International Meridian Conference in Washington, DC, Greenwich emerged as the most pragmatic choice for a global prime meridian, though not unanimously or without acrimony. Even after 1884, other prime meridians remained in use for decades. As Zero Degrees shows, geographies of the prime meridian are a testament to the power of maps, the challenges of accurate measurement on a global scale, and the role of scientific authority in creating the modern world.

Author: William D. McPherson
Publisher:
ISBN:
Category : Astromony
Languages : en
Pages : 64

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 60

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Author: John Crerar Library
Publisher:
ISBN:
Category : Periodicals
Languages : en
Pages : 250

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Author: Lauren Gunderson
Publisher: Dramatists Play Service, Inc.
ISBN: 0822233800
Category : Drama
Languages : en
Pages : 65

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THE STORY: When Henrietta Leavitt begins work at the Harvard Observatory in the early 1900s, she isn’t allowed to touch a telescope or express an original idea. Instead, she joins a group of women “computers,” charting the stars for a renowned astronomer who calculates projects in “girl hours” and has no time for the women’s probing theories. As Henrietta, in her free time, attempts to measure the light and distance of stars, she must also take measure of her life on Earth, trying to balance her dedication to science with family obligations and the possibility of love. The true story of 19th-century astronomer Henrietta Leavitt explores a woman’s place in society during a time of immense scientific discoveries, when women’s ideas were dismissed until men claimed credit for them. Social progress, like scientific progress, can be hard to see when one is trapped among earthly complications; Henrietta Leavitt and her female peers believe in both, and their dedication changed the way we understand both the heavens and Earth.

Author: Thomas R. Williams
Publisher: Cambridge University Press
ISBN: 1139496344
Category : Science
Languages : en
Pages : 449

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Founded in 1911, the AAVSO boasts over 1200 members and observers and is the world's largest non-profit organization dedicated to variable star observation. This timely book marks the AAVSO's centennial year, presenting an authoritative and accurate history of this important association. Writing in an engaging and accessible style, the authors move chronologically through five eras of the AAVSO, discussing the evolution of its structure and purpose. Throughout the text, the main focus is on the thousands of individuals whose contributions have made the AAVSO's progress possible. Describing a century of interaction between amateur and professional astronomers, the authors celebrate the collaborative relationships that have existed over the years. As the definitive history of the first hundred years of the AAVSO, this text has broad appeal and will be of interest to amateur and professional astronomers, as well as historians and sociologists of science in general.

Author: University of California Berkeley. Library
Publisher:
ISBN:
Category : Academic libraries
Languages : en
Pages : 844

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