Comet Lore: Halley's Comet in History and Astronomy — John Shaqi
Comet Lore: Halley's Comet in History and AstronomyEmerson, Edwin
History
Comet Lore: Halley's Comet in History and Astronomy
Emerson, Edwin
Comets; Halley's comet
For the French, the Comet signalled disaster after disaster. After
their armies had been beaten in Germany, their navy was defeated on
August 17 in a great sea fight in the Bay of Lagos, on the coast of
Portugal. Six weeks later there was another bloody sea fight between
the British and French, when Admiral Pocock inflicted a telling defeat
on the French fleet.
Then came the final French naval disaster off Quiberon, in the Bay of
Biscay, when Admiral Hawke destroyed French naval power by sinking
or blowing up over a score of the French fighting ships. This bloody
defeat was a disaster of untold consequences to the French, since it
meant the loss of India.
But this was not all that this Comet of ill omen had brought to the
French.
On September 13th of that year the French lost their strongest hold on
America in the disastrous defeat inflicted upon them by General Wolfe
in the bloody battle on the Plains of Abraham, where Wolfe himself fell
fighting. On the French side, General Montcalm, the Commander-in-Chief,
was mortally wounded. This meant the loss of Quebec and of all Canada
to the French, an event of far-reaching importance that has changed the
destiny of all America and of the modern world.
1682
The Comet which put Halley on the right track in his theories of
Comets, first came into view on the night of August 15, 1682. It was
first detected by Flamsteed’s assistant at the Greenwich Observatory,
while searching the northern heavens with a telescope.
Flamsteed, the first Astronomer Royal, and Halley, his successor, kept
a close watch upon the Comet every night, and followed its course over
the sky. Others who watched it were Sir Isaac Newton, Cassini, Picard
and La Hire in Paris, Baert at Toulon, Kirch and Zimmermann in Germany,
Montanari at Padua, and Hevelius in Dantsic. They observed that the
tail lengthened considerably as the Comet came nearer the sun. Later
a jet of luminous matter was seen shooting out toward the sun, which
afterward fell back into the tail. Hevelius has left us a drawing of
this phenomenon.
On November 11th, Halley found that the Comet had come within a
semi-diameter of the path of our earth. This startling discovery
caused Halley to reflect what might happen if the earth and the Comet
had arrived at the same time at the spot in space where their two
orbits intersect. Assuming as he did that the mass of the Comet was
considerably larger than our earth, he declared: “If so large a body
with so rapid a motion were to strike the earth—a thing by no means
impossible—the shock might reduce this beautiful world to its original
chaos.”
[Illustration: HALLEY’S COMET, JANUARY 9, 1683, AS DRAWN BY HEVELIUS.]
[Illustration: THE COMET OF 1682, AS REPRESENTED IN THE NUREMBURG
CHRONICLE.]
[Illustration: MEDAL STRUCK IN GERMANY TO ALLAY THE TERROR CAUSED BY
THE COMET OF 1680-81.
TRANSLATION OF INSCRIPTION:
“THE STAR THREATENS EVIL THINGS—ONLY TRUST!
GOD WILL MAKE IT TURN OUT WELL.”]
Public-domain text, read in full here on John Shaqi.
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