Astrometría e Historia de la Astronomía

José Gómez Castaño 

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  • Trabajos sobre Astrometría
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    Mi otro blog

    Blogalia

    Nuevo Methodo para componer, y arreglar cada uno todo genero de Reloxes fin necefsidad de Reloxero

    He aprovechado unos días de nubosidad para leer un pequeño libro de Manuel Edrevlav publicado en 1731. Se trata de un pequeño manual con el que poner en hora los relojes de la época.

    Lo que más me interesó no es la forma de realizar las correcciones sobre los relojes, sino la fuenta excogida para ponerlos en hora. Al no existir en la época una fuente unificada que difundiera la hora oficial, se optó por algún fenómeno astronómico. En este caso el orto y ocaso del sol.

    Por esto, se incluye una tabla con las horas de salida y puesta del sol para la latitud de Madrid. Para poner en hora los relojes, bastaría con observar el fenómeno y colocar la hora de la tabla en el reloj.

    Aquí se puede consultar el resumen completo del libro

    2006-01-04 11:27 | Categoría: | 46 Comentarios | Enlace



    Referencias (TrackBacks)

    URL de trackback de esta historia http://meridies.blogalia.com//trackbacks/36248

    Comentarios

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    De: rvr Fecha: 2006-01-04 11:45

    Recuerdo haber leído que alguien -no sé si Galileo- propuso los eclipses de los satélites galileanos para poner en hora los relojes.



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    De: Pepe Fecha: 2006-01-04 15:57

    Sí, para resolver el problema de la determinación de la longitud, Galileo propuso un instrumento para llevar a bordo de los barcos, que consistía en un telescopio para observar los eclipses de los satélites jovianos y comparar la hora local a la que se producían con la hora prevista, y de ahí determinar la longitud de la nave. Se desestimó por la inestabilidad que tenía el instrumento en la cubierta de un navío, pero el método se usó en tierra firme.



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