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  2. Observational history of comets - Wikipedia

    en.wikipedia.org/.../Observational_history_of_comets

    The arrows could hit animals or people and were feared when walking at night. Comets were conceived as smoking stars and as bad omens, e.g., announcing the death of a ruler. [9] Ancient Chinese records of comet apparitions have been particularly useful to modern astronomers. They are accurate, extensive, and consistent over three millennia.

  3. Historical comet observations in China - Wikipedia

    en.wikipedia.org/wiki/Historical_comet...

    Around forty comets have had their orbits calculated based entirely on ancient Chinese records. [2] Of the well known comets, besides Halley, Brian G. Marsden suggested, based on Chinese and other ancient observations, that the Great Comet of 1106 was a previous apparition of Comet Ikeya–Seki. [14]

  4. Comet - Wikipedia

    en.wikipedia.org/wiki/Comet

    Comets whose aphelia are near a major planet's orbit are called its "family". [81] Such families are thought to arise from the planet capturing formerly long-period comets into shorter orbits. [82] At the shorter orbital period extreme, Encke's Comet has an orbit that does not reach the orbit of Jupiter, and is known as an Encke-type comet.

  5. New findings show ancient comet likely responsible for glass ...

    www.aol.com/findings-show-ancient-comet-likely...

    New research finds that the dark silicate glass strewn across a vast swath of the Atacama Desert was created by an exploding comet around 12,000 years ago. (Image/P.H. Schultz, Brown University)

  6. Great Comet of 371 BC - Wikipedia

    en.wikipedia.org/wiki/Great_Comet_of_371_BC

    Heinrich Kreutz was a German astronomer who claimed that the orbits of several sungrazing comets were related and likely produced when a large Sun-grazing comet fragmented hundreds of years previously. [11] That group, known as the Kreutz Sungrazers, has produced some of the brightest comets ever observed, including X/1106 C1 and Comet Ikeya ...

  7. Lists of comets - Wikipedia

    en.wikipedia.org/wiki/Lists_of_comets

    Periodic comets usually have elongated elliptical orbits, and usually return to the vicinity of the Sun after a number of decades. The official names of non-periodic comets begin with a "C"; the names of periodic comets begin with "P" or a number followed by "P". Comets that have been lost or disappeared have names with a "D". Comets whose ...

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  9. List of periodic comets - Wikipedia

    en.wikipedia.org/wiki/List_of_periodic_comets

    Periodic comets sometimes bear the same name repeatedly (e.g. the nine Shoemaker–Levy comets or the twenty-four NEAT comets); the IAU system distinguishes between them either through the number prefix or by the full designation (e. g. 181P and 192P/Shoemaker–Levy are both "Comet Shoemaker–Levy"). In the literature, an informal numbering ...

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