A total solar eclipse crosses England, predicted by Edmond Halley
On this day · 3 May 1715
Using Newton's gravity, Halley forecast where and when the Moon would swallow the Sun — and missed by only four minutes.
On May 3, 1715 (April 22 by England’s old Julian calendar), a total solar eclipse swept a broad shadow across Britain. Edmond Halley had told everyone it was coming. Applying Newton’s new theory of universal gravitation, he published a broadsheet map predicting both the path and the timing of totality.
He was astonishingly close. The eclipse arrived within about four minutes of his forecast, and the shadow’s track fell within roughly 20 miles of where he had drawn it.
Londoners watched the Sun vanish for 3 minutes 33 seconds of eerie midday darkness.
The 295-kilometre-wide path of totality crossed England and Wales before sweeping on toward Scandinavia and northern Russia. The event became known as Halley’s Eclipse — the first ever predicted by Newtonian mechanics — and it turned a frightening omen into a public demonstration that the heavens could be calculated in advance.
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