Archimedes's Measurement of the Sun's Apparent Diameter

@article{Shapiro1975ArchimedessMO,
  title={Archimedes's Measurement of the Sun's Apparent Diameter},
  author={A. Eugene Shapiro},
  journal={Journal for the History of Astronomy},
  year={1975},
  volume={6},
  pages={75 - 83}
}
  • A. Shapiro
  • Published 1 June 1975
  • Physics
  • Journal for the History of Astronomy
Although Archimedes's principal concern in The sand-reckoner is arithmetical, the work is equally important for its astronomical contribution. Archimedes's goal in The sand-reckoner is to demonstrate that he can write a number so large that it will exceed even the number of grains of sand needed to fill the entire universe, so he must first find the size of the universe. It is at this point that Archimedes relates, in a well-known passage, Aristarchus's heliocentric theory. Since an… 

Figures from this paper

How big is the Sun: Solar diameter changes over time
The measurement of the Sun's diameter has been first tackled by the Greek astronomers from a geometric point of view. Their estimation of ~1800", although incorrect, was not truly called into
Rights and wrongs of the temporal solar radius variability
AbstractFrom time immemorial men have strived to measure the size of celestial bodies. Among them, the diameter of the Sun was a source of curiosity and study. Tackled by Greek astronomers from a
The introduction of dated observations and precise measurement in Greek astronomy
It is a commonplace that a characteristic feature of scientific astronomy is the use of precise positional data observed at specified moments in time. Thus, it is surprising that there has been
A New View of Early Greek Astronomy
THE STANDARD HISTORY OF GREEK ASTRONOMY emphasizes the role of planetary theory in its earlier stages, by supposing that the early astronomers aimed primarily to explain planetary phenomena. This
Solar radius variations: new look on the wavelength dependence
Abstract The possibility that the Sun's radius is changing, even at a faint level, has been discussed over a long time. As the solar radius is certainly one of the most important basic pieces of

References

SHOWING 1-9 OF 9 REFERENCES
Histoire de l'astronomie ancienne (Paris, 1817; reprinted New York, 1965), i, 103-5; Friedrich Hultsch
  • Winkelmessungen durch die Hipparchische Dioptra
  • 1947
Uno strumento astronomico descritto nel corpus Archimedeo: La dioptra di Archimede
  • Physis, xii
  • 1970
Archimedes, 226; Heath, Aristarchus
    ]), 223. In Hypothesis 6 Aristarchus assumed "that the Moon subtends one fifteenth part of a sign of the zodiac
    • Aristarchus of Samos (Oxford, 1913), 353)
    • 1912
    For a description and analysis of this experiment see Lejeune
      Eine physikalische Prazisionsmessung des Archimedes
      • Archiv fiir Geschichte der Mathematik, der Naturwissenschaften und der Technik, x