Diameter of the sun in AD 1715

Details Diameter of the sun in AD 1715 Diameter of the sun in AD 1715

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.331..421m&link_type=abstract

Nature (ISSN 0028-0836), vol. 331, Feb. 4, 1988, p. 421-423.

Computer Science

9

Solar Diameter, Solar Eclipses, England, Photosphere

Scientific paper

Ribes et al. have reopened the discussion about the variability of the Sun's diameter over the past few hundred years by asserting that observations made by Picard and La Hire during the late seventeenth and early part of the eighteenth century indicate that the diameter of the Sun was ≡4 arc s greater then than it is now. In two earlier papers the conclusion drawn from analyses of solar eclipses and transits of Mercury was that there has been little or no discernible secular change in the Sun's diameter since 1715. Here the authors say that the two results are incompatible, and they give a new and careful discussion of the 1715 eclipse in support of their contention.

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