History of astronomy

The evolution of astronomical thought from antiquity to the renaissance

George Forbes

92 pages, parution le 14/02/2024

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Résumé

The "History of Astronomy" by George Forbes provides a comprehensive overview of the development of astronomical thought from ancient times through the Renaissance. The text begins by exploring the early astronomical practices of ancient civilizations such as the Chinese and Chaldæans, highlighting their contributions to the understanding of celestial phenomena. The work of Greek philosophers and astronomers, including Thales, Pythagoras, and Hipparchus, is examined, showcasing their attempts to explain the cosmos through geometric and philosophical frameworks. The text then shifts focus to the era dominated by the Ptolemaic system, which utilized epicycles and deferents to predict planetary motions. This period saw limited progress until the Renaissance, when figures like Copernicus began to challenge the geocentric model. Copernicus proposed a heliocentric system, reviving ideas from Pythagoras and Aristarchus, although his model still relied heavily on epicycles. The narrative culminates with the contributions of Tycho Brahe and Johannes Kepler, who laid the groundwork for a more accurate and dynamic understanding of the solar system. Tycho Brahe's precise observations and Kepler's laws of planetary motion marked a significant shift from geometric to dynamic astronomy, setting the stage for Newton's later work on universal gravitation. Forbes' work underscores the cumulative nature of scientific progress, emphasizing how new perspectives and methodologies have expanded human understanding of the universe.