Article ID: CBB080506663

Fotheringham’s 1920 Accelerations of the Sun and Moon Revisited (2020)

unapi

One hundred years ago, J.K. Fotheringham famously derived the “accelerations” of the Sun and Moon from the reports of 11 classical solar eclipses. We review critically the reliability of these eclipse reports and rework his diagrammatic method, treating the deceleration of the Earth’s rotation as an unknown, rather than the “acceleration” of the Sun. There is some serendipity in his choice of the critical eclipses, which opportunely facilitated his derivation of seemingly accurate results for the accelerations.

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Authors & Contributors
Stephenson, F. Richard
Eade, J. C.
Gislén, Lars
Hohenkerk, Catherine Y.
Morrison, Leslie V.
Becker, Barbara J.
Journals
Journal for the History of Astronomy
Almagest
Archive for History of Exact Sciences
Centaurus: International Magazine of the History of Mathematics, Science, and Technology
Endeavour: Review of the Progress of Science
Guangxi Minzu Xueyuan Xuebao
Publishers
Cambridge University Press
MagaVelda Press
Oxford University Press
Concepts
Eclipses; transits; occultations; conjunctions
Astronomy
Moon
Sun
Cosmology
Solar system; planets
People
Ptolemy
Aflah, Yabir ibn al
Gassendi, Pierre
Huggins, William
Liu Hong
Philolaus of Croton
Time Periods
Ancient
12th century
Medieval
15th century
17th century
19th century
Places
China
Babylon (extinct city)
India
Southeast Asia
Europe
Greece
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