Great Comet of 1556
A comet linked to Emperor Charles V's abdication and a failed return prediction.
The Great Comet of 1556, known in modern records as C/1556 D1, was first spotted in February of that year and seen across much of Europe. While some places reported it before the end of February, most observations began in the middle of the first week of March. Its apparent diameter measured half that of the Moon, and its tail was likened to "the flame of a torch agitated by the wind." Cornelius Gemma, son of Gemma Frisius, noted that the comet's head initially appeared as large as Jupiter and had a color similar to Mars. The mathematician and physician Paul Fabricius, who served at the court of Holy Roman Emperor Charles V, tracked its course. According to NASA, the first report came on 27 February 1556; the comet reached perigee on 13 March and perihelion on 22 April.
This comet is also called the comet of Charles V. Upon seeing it, the emperor stood stunned and declared, "By this dread sign my fates do summon me." Having long considered withdrawing from the world after his conquests, he took the comet as a heavenly command and hurried to the monastery of St. Juste in Placentia. An anonymous English treatise from 1618, *Blazing Stares*, recounted that Charles, gazing intently at the star and deeply pondering its meaning, fell into great astonishment. He summoned a philosopher named Eginard and debated the star's significance, concluding that it threatened some dire calamity.
The Portuguese Dominican friar Gaspar da Cruz, who visited Guangzhou in 1556, linked the comet to the devastating Shaanxi earthquake that same year. In his 1569 book, he speculated that the comet might signal calamities not only for China but for the entire world, possibly even the birth of the Antichrist.
In the 19th century, John Russell Hind, building on calculations from Conrad Wolfhardt's chart and other old records, compared his results to an account by Friar Giles of Cambridge of a grand comet in 1264. Following Richard Dunthorne’s earlier lead, Hind concluded that the comet of 1556 was the same as that of 1264, finding a high probability of identity. He predicted a return to perihelion around 1848 to 1850. That prediction failed, and as of 2009, no observed comet matched the orbital elements of either. David A. Sargent later wrote that available evidence suggests no connection between the comets of 1264 and 1556.
Quick Facts
- Discovery Date
- 27 February 1556
- Orbit Ref
- jpl
- Epoch
- 22 April 1556 (JD 2289499.185)
- Observation Arc
- 52 days
- Obs
- 36
- Perihelion
- 0.4908 AU
- Eccentricity
- ~1.000
- Inclination
- 32.37°
- Asc Node
- 181.44°
- Arg Peri
- 100.87°
- Last P
- 22 April 1556
Facts from the source article.
Lore & Background
The Great Comet of 1556 first appeared in February 1556 and was observed throughout much of Europe. It was seen in some places before the end of February, but not generally observed until the middle of the first week of March. Its apparent diameter was equal to half that of the Moon, and its tail was said to resemble 'the flame of a torch agitated by the wind.' Cornelius Gemma, son of Gemma Frisius, said the head of the comet when it first appeared was as large as Jupiter and its color resembled that of Mars. The course of the comet was observed by Paul Fabricius, a mathematician and physician at the court of Charles V, Holy Roman Emperor.
The comet is called the comet of Charles V. When he 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. An anonymous English treatise on Blazing Stares (1618) spoke of the comet, recounting that Charles, having his eyes earnestly bent upon the star, was wrapped into a great astonishment and sent for a philosopher named Eginard, saying the appearing thereof did threaten unto him some dire calamity.
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.
Reader's Guide
The Great Comet of 1556 is significant primarily for its cultural and historical impact, as recorded in the source article. It is famously tied to Holy Roman Emperor Charles V, who interpreted the comet as a divine summons to retire from the world and subsequently entered the monastery of St. Juste. This anecdote, along with the account from an anonymous English treatise, underscores the comet's role in medieval and Renaissance astrological belief, where comets were seen as omens of personal or political change.
The comet also gained scientific interest in the 19th century when John Russell Hind, grounding his calculations upon elements deduced from Conrad Wolfhardt's chart and comparing them with an account of a comet in 1264, concluded that the comet of 1556 was a return of the Great Comet of 1264. He predicted a return to perihelion about 1848 to 1850. The prediction failed, and as of 2009, no observed comet has matched the orbital elements of either comet. David A. Sargent wrote that available evidence points to there being no connection between the comets of 1264 and 1556. This failed prediction highlights the challenges of historical comet identification and the limits of early orbital calculations.
Additionally, the comet was interpreted religiously by Gaspar da Cruz, who linked it to the 1556 Shaanxi earthquake and speculated it might be a sign of the Antichrist. This illustrates how comets were often woven into contemporary religious and apocalyptic narratives across different cultures.
Did You Know?
- The comet's tail was described as resembling 'the flame of a torch agitated by the wind.'
- John Russell Hind predicted the comet would return around 1848 to 1850, but the prediction failed.
- The Portuguese Dominican friar Gaspar da Cruz associated the comet with the 1556 Shaanxi earthquake.
More in Named Comets, Part 3 1-24
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