Part 20

Chinese annals of this year record a Comet seen in the northern constellation of Ophiuchus in October. This year marks the beginning of the tremendous migration of peoples, which started in Mongolia and Tartary, and crossing the Volga gradually overflowed all the known world, like a huge human deluge.

295

The appearance of a Comet this year (identified by Hind with Halley’s) was followed by a bloody rebellion of the ancient Britons against the Romans, and by another rebellion against Rome by the Egyptians. These patriotic uprisings of the people were suppressed with fire and sword and both countries ran with blood.

218

The Chinese catalogue of Ma-tuan-lin records a Comet with a path exactly analogous with the orbit of Halley’s Comet computed for that year by Hind. In the Chinese record the Comet is described as “pointed and bright.” Its coming was connected with the death of Emperor Ween-te directly afterward, and the Civil Wars between various claimants to the throne of the Celestial Empire, which then rent China asunder.

Dion Cassius, the Roman historian, describes the Comet of this year as “a very fearful star with a tail stretching from the West towards the East.”

The Roman augurs explained the Comet as a portent of the bloody death of Emperor Macrinus of Rome, who was murdered by his own soldiers on the night after the disappearance of the Comet.

141

In this year the Chinese astronomers recorded a Comet in March and April (the time computed for Halley’s Comet), which they described as “a star six or seven cubits long and of a bluish-white colour.” The coming of the Comet was followed by a virulent outbreak of the plague in China and the Far East, which spread all over the known world. So virulent was this pestilence that in the City of Naples alone 400,000 people died of the disease.

65-66

Halley’s Comet, according to astronomic calculations, must have made its reappearance during the winter months of 65-66 A. D. The Chinese have recorded “two Comets,” one in 65, which was seen for fifty-six days, and “the other” in February, 66, which remained visible fifty days.

This was the Comet which St. Peter and Josephus saw over the City of Jerusalem, before the fall of the Holy City. Josephus wrote of it: “Amongst other warnings, a Comet, of the kind called Xiphias, because their tails appear to represent the blade of a sword, was seen above the doomed city for the space of nearly a whole year.”

Jerusalem was ravaged by pestilence and famine and soon afterward was stormed by the Roman soldiery led by Titus. The Temple was burned down and the streets of the Holy City ran with blood. It was the end of Jerusalem and of the Jews as a free city and people.

B. C. 11

This is the farthest back that the appearances of Halley’s Comet have been traced in history. For earlier appearances there are no sufficiently trustworthy computations or records.

Dion Cassius in his “History of Rome” has recorded “a Comet which hung suspended over the City of Rome just before the death of Agrippa,” who ruled over the Roman Empire during the absence of Augustus in Greece and Asia. Agrippa was so universally beloved, and his death was held to be such a loss to Rome that he was buried with imperial honours in the tomb intended for Augustus.

The death of Agrippa occurred in the year 12, shortly after the disappearance of the Comet which Hind has identified with Halley’s.

* * * * *

This completes the record of all the known appearances of Halley’s Comet. The record fully justifies Chambers’ dictum, that the “Comet known as Halley’s is by far the most interesting of all the Comets recorded in history.”

This historic record also appears to justify in no small measure the popular beliefs of the last two thousand years concerning Comets, as expressed by Leonard Digges in his book on Prognostics, published 350 years ago:

“Cometes signifie corruption of the ayre. They are signs of earthquakes, of warres, of changying of Kyngdomes, great dearth of food, yea a common death of man and beast from pestilence.”

THE STORY OF EDMUND HALLEY

The great French astronomer Lalande considered Halley the greatest astronomer of his time. This opinion is still held. Halley’s “time” means the age of Kepler, Sir Isaac Newton, Flamsteed, Hevelius, and Leibnitz, all of whom achieved first rank in Astronomy.

Halley’s greatest achievement in Astronomy was the discovery that our solar system was but an atom in immeasurable space whence wandering stars could be caught within the influence of our Sun, our Earth and the other Planets swinging around our Sun.

Halley was the first to discover and to prove that the Comets that come within the vision of man have fixed periods of return. He made this discovery during the appearance of the great Comet of 1682, which has since been known by his name.

In his studies of the motions of Comets, of which Halley computed the orbits of twenty-four, he observed that a Comet of similar phenomena, recorded by Appian in 1531 and by Kepler in 1607, had swung through the same orbit as the Comet under his observation in 1682. Halley surmised from this that these Comets might be one and the same, whose intervals of return appeared to cover a period of seventy-five or seventy-six years. Halley’s surmise seemed to be confirmed by the recorded appearance of similar bright Comets in the years 1456, 1378, and 1301, the intervals again being seventy-five or seventy-six years.

Halley was deeply imbued with Newton’s new discovery of gravitation, for the publication of which Halley paid the expenses, so he brought the principles of Newton’s theory of gravitation to bear on his own new theory of the motions of Comets. He rightly conjectured that Comets were drawn to our Sun across the disturbing orbits of our planetary system, and that the comparatively small differences of one or two years in the recorded intervals of this one Comet (Halley’s Comet) were due to the attraction of the larger planets.

During the previous year, 1681, Halley computed that the Comet had passed near the planet Jupiter, the attraction of which must have had a considerable influence on the Comet’s motion. Making due allowance for this disturbing influence of Jupiter, he computed that the Comet would return to the vicinity of our Sun about the end of 1758 or beginning of 1759.