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
Morrison, Leslie V.
Hohenkerk, Catherine Y.
Tanner, Brian K.
Gullberg, Steven
Gasper, Giles E. M.
Concepts
Astronomy
Sun
Eclipses; transits; occultations; conjunctions
Moon
Cosmology
Solar system; planets
Time Periods
Ancient
17th century
12th century
Prehistory
Medieval
20th century, early
Places
Greece
China
Middle and Near East
Thailand
Myanmar (Burma)
Spain
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