Great Comet of 1556

The Great Comet of 1556 (designated C/1556 D1 in modern nomenclature) was a comet that first appeared in February 1556, and which was observed throughout much of Europe. The comet appears to have been seen in some places before the end of February, but it was not generally observed until the middle of the first week in March. Its apparent diameter was equal to half that of the Moon, and the tail was said to resemble "the flame of a torch agitated by the wind." Cornelius Gemma (the son of Gemma Frisius) said that the head of the comet, when it first appeared, was as large as Jupiter, and that its color resembled that of Mars.[1]

The course of the comet of 1556 was observed by Paul Fabricius, a mathematician and physician at the court of Charles V, Holy Roman Emperor.[1]

According to NASA, the comet was firstly reported on 27 February 1556. It was in perigee on 13 March and in perihelion on 22 April.[2]

Charles V comet
An astronomical broadsheet by Paul Fabricius, showing the map of the 1556 comet's course

The Great Comet of 1556 is called the comet of Charles V. When the Emperor first caught sight of it he stood aghast, and exclaimed: "By this dread sign my fates do summon me". Charles had long meditated about retiring from the world after his conquests. Regarding the comet as a sign of Heaven's command to do so, he hastened towards the peaceful monastery of St. Juste, Placentia.[3]

An anonymous English treatise on "Blazing Stares" (1618) spoke of the comet as follows :

In the time of Charles the Emperor, surnamed the Great, a blazing star appeared, in the contemplation whereof the Emperor, having his eyes earnestly bent upon the star and considering profoundly thereupon, at length was wrapped into a great astonishment touching the significance of the same; and sending for a philosopher named Eginard, reasoned with him to and fro about the star, saying in conclusion that the appearing thereof did threaten unto him some dire calamity.[3]

Contemporary religious interpretation

The Portuguese Dominican friar Gaspar da Cruz, who visited Guangzhou in 1556, associated the comet with the devastating 1556 Shaanxi earthquake. In his 1569 book he wondered if the comet was a sign of calamities not just for China, but for the entire world – and could be even the sign of the birth of Antichrist.[4]

Alleged connection to the Great Comet of 1264
A comet seen in Russia during two weeks in winter, 1556. Illustrated Chronicle of Ivan the Terrible

Grounding his calculations upon elements deduced from Conrad Wolfhardt's chart along with some other crude data gathered from old records, and comparing the result he obtained with the account given by Friar Giles of Cambridge of a grand comet which appeared in 1264, John Russell Hind was led to conclude, as Richard Dunthorne had been in the previous century, that the comet of Charles V was that of 1264 returned. At any rate, he found a high degree of probability in favor of the conclusion at which he had arrived, and argued that the bodies of these years were identical. Hence he concluded that a return to perihelion might be looked for about the middle of the 19th century, 1848 to 1850. This prediction failed, and as of 2009 no observed comet has matched the orbital elements of either comet. David A. Sargent writes that available evidence points to there being no connection between the comets of 1264 and 1556.[5]

References
  1. John Russell Hind (1848). On the expected return of the great comet of 1264 and 1556. Pontoon: G. Hoby, London. p. 33.
  2. "Great Comets in History". ssd.jpl.nasa.gov. Retrieved 2023-10-26.
  3. Lady Randolph Spencer Churchill (1900). The Anglo-Saxon review, Volume 6. John Lane London and New York. p. 40.
  4. Cruz, Gaspar da (1953), "Treatise in which the things of China are related at great length, with their particularities, ... Composed by the Rev. Father Fr. Gaspar da Cruz of the Order of Sain Dominic", in Boxer, Charles Ralph (ed.), South China in the sixteenth century: being the narratives of Galeote Pereira, Fr. Gaspar da Cruz, O.P. [and] Fr. Martín de Rada, O.E.S.A. (1550–1575), Issue 106 of Works issued by the Hakluyt Society, Printed for the Hakluyt Society (Translation of da Cruz's 1569 book, with C.R. Boxer's comments)
  5. Seargent, David A. (2009). The Greatest Comets in History: Broom Stars and Celestial Scimitars. Springer Science+Business Media. p. 99. ISBN 978-0-387-09512-7.

Notes
  •  This article incorporates text from On the expected return of the great comet of 1264 and 1556, by John Russell Hind, a publication from 1848, now in the public domain in the United States.
  •  This article incorporates text from The Anglo-Saxon review, Volume 6, by Lady Randolph Spencer Churchill, a publication from 1900, now in the public domain in the United States.
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