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planets  

Definición

  • Astronomy, one of the oldest sciences of humankind, always provided orientation in space and time: Cardinal directions (east, north, west, south) are defined and obtained by basic astronomical measurements. Time and calendar issues are also definable and measurable by astronomical observations: One “year” is the period the earth needs for one full revolution around the sun (originally, before the Copernican revolution, it was seen the other way around), and one “month” is roughly the time our moon needs to orbit the earth. [Source: Encyclopedia of Time: Science, Philosophy, Theology, & Culture; Planets]

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URI

http://data.loterre.fr/ark:/67375/N9J-J14K07KD-T

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