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Each IAU constellation has an official three-letter abbreviation based on the genitive form of the constellation name. As the genitive is similar to the base name, the majority of the abbreviations are just the first three letters of the constellation name: Ori for Orion/Orionis, Ara for Ara/Arae, and Com for Coma Berenices/Comae Berenices.
In practice forms ending in -ean may be pronounced as if they were spelled -ian even if the e is long in Latin. This dichotomy should be familiar from the dual pronunciations of Caribbean as / ˌ k ær ɪ ˈ b iː ə n / KARR -ə- BEE -ən and / k ə ˈ r ɪ b i ə n / kə- RIB -i-ən .
In Vedic period astronomy, which drew its zodiac signs and many constellations from the period of the Indo-Greek Kingdom, Indian observers saw the asterism as a boat. [ 17 ] The Māori had several names for the constellation, including Te Waka-o-Tamarereti (the canoe of Tamarereti), [ 18 ] Te Kohi-a-Autahi (an expression meaning "cold of autumn ...
Roman numerals: for example the word "six" in the clue might be used to indicate the letters VI; The name of a chemical element may be used to signify its symbol; e.g., W for tungsten; The days of the week; e.g., TH for Thursday; Country codes; e.g., "Switzerland" can indicate the letters CH; ICAO spelling alphabet: where Mike signifies M and ...
This glossary of astronomy is a list of definitions of terms and concepts relevant to astronomy and cosmology, their sub-disciplines, and related fields. Astronomy is concerned with the study of celestial objects and phenomena that originate outside the atmosphere of Earth. The field of astronomy features an extensive vocabulary and a ...
In modern astronomical writing, all the constellations, including the 12 of the zodiac, have dedicated three-letter abbreviations, which specifically refer to constellations rather than signs. [105] The zodiac symbols are also sometimes used to represent points on the ecliptic, particularly the solstices and equinoxes.
A supernova's permanent designation is formed by the standard prefix "SN", the year of discovery, and a suffix composed of one to three letters of the Latin alphabet. The first 26 supernovae of the year receive a capital letter from A to Z. Subsequent supernovae of that year are designated with pairs of lower-case letters from "aa" to "az", and ...
The three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "Aps". [9] The official constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, [ b ] are defined by a polygon of six segments ( illustrated in infobox ).