|
Epsilon Canis Majoris A
Epsilon Canis Majoris is a binary star system and the second-brightest star in the constellation of Canis Major. Its name is a Bayer designation that is Latinised from ε Canis Majoris, and abbreviated Epsilon CMa or ε CMa. This is the 22nd- brightest star in the night sky with an apparent magnitude of 1.50. About 4.7 million years ago, it was the brightest star in the night sky, with an apparent magnitude of −3.99. Based upon parallax measurements obtained during the Hipparcos and the Gaia mission, it is about light-years distant. The two components are designated ε Canis Majoris A, officially named Adhara – the traditional name of the system, and B. Nomenclature ''ε Canis Majoris'' (Latinised to ''Epsilon Canis Majoris'') is the binary system's Bayer designation. The designations of the two components as ''ε Canis Majoris A'' and ''B'' derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canis Major
Canis Major is a constellation in the southern celestial hemisphere. In the second century, it was included in Ptolemy's 48 constellations, and is counted among the 88 modern constellations. Its name is Latin for "greater dog" in contrast to Canis Minor, the "lesser dog"; both figures are commonly represented as following the constellation of Orion (constellation), Orion the hunter through the sky. The Milky Way passes through Canis Major and several open clusters lie within its borders, most notably Messier 41, M41. Canis Major contains Sirius, the brightest star in the night sky, known as the "dog star". It is bright because of its proximity to the Solar System and its intrinsic brightness. In contrast, the other bright stars of the constellation are stars of great distance and high luminosity. At magnitude 1.5, Epsilon Canis Majoris (Adhara) is the second-brightest star of the constellation and the brightest source of extreme ultraviolet radiation in the night sky. Next in b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arabic
Arabic (, , or , ) is a Central Semitic languages, Central Semitic language of the Afroasiatic languages, Afroasiatic language family spoken primarily in the Arab world. The International Organization for Standardization (ISO) assigns language codes to 32 varieties of Arabic, including its standard form of Literary Arabic, known as Modern Standard Arabic, which is derived from Classical Arabic. This distinction exists primarily among Western linguists; Arabic speakers themselves generally do not distinguish between Modern Standard Arabic and Classical Arabic, but rather refer to both as ( "the eloquent Arabic") or simply ' (). Arabic is the List of languages by the number of countries in which they are recognized as an official language, third most widespread official language after English and French, one of six official languages of the United Nations, and the Sacred language, liturgical language of Islam. Arabic is widely taught in schools and universities around the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kappa Canis Majoris
Kappa Canis Majoris, Latinized from κ Canis Majoris, is a solitary, blue-white hued star in the constellation Canis Major. It is visible to the naked eye with an apparent visual magnitude of +3.87. Based upon an annual parallax shift of 7.70 mas as seen from Earth, this star is located about 660 light years from the Sun. This is a B-type main-sequence star with a stellar classification of B1.5 Ve, although Hiltner et al. (1969) classified it as B1.5 IVe suggesting it is a subgiant star. The 'e' suffix indicates it is a rapidly rotating Be star with a circumstellar decretion disk of heated gas. The radius of the emitting disk is about , or about 3.7 times the radius of the star. It is classified as a Gamma Cassiopeiae type variable star and its brightness varies from magnitude +3.4 to +3.97. The star became 50% brighter between 1963 and 1978, increasing from magnitude 3.96 or so to 3.52. Naming In Chinese, (), meaning ''Bow and Arrow The bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asterism (astronomy)
An asterism is an observational astronomy, observed pattern or group of stars in the sky. Asterisms can be any identified star pattern, and therefore are a more general concept than the IAU designated constellations, 88 formally defined constellations. Constellations are based upon asterisms, but unlike asterisms, constellations are defined regions with official boundaries which together encompass the entire sky. Asterisms range from simple shapes of just a few stars to more complex collections of many stars covering large portions of the sky. The stars themselves may be bright naked-eye objects or fainter, even telescopic, but they are generally all of a similar brightness to each other. The larger brighter asterisms are useful for people who are familiarizing themselves with the night sky. The patterns of stars seen in asterisms are not necessarily a product of any physical association between the stars, but are rather the result of the particular perspectives of their observ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eta Carinae
η Carinae (Eta Carinae, abbreviated to η Car), formerly known as η Argus, is a stellar system containing at least two stars with a combined luminosity greater than five million times that of the Sun, located around distant in the constellation Carina. Previously a 4th-magnitude star, it brightened in 1837 to become brighter than Rigel, marking the start of its so-called "Great Eruption". It became the second-brightest star in the sky between 11–14 March 1843 before fading well below naked-eye visibility after 1856. In a smaller eruption, it reached 6th magnitude in 1892 before fading again. It has brightened consistently since about 1940, becoming brighter than magnitude 4.5 by 2014. At declination −59° 41′ 04.26″, η Carinae is circumpolar from locations on Earth south of latitude 30°S (for reference, the latitude of Johannesburg is 26°12′S), and is not visible north of about latitude 30°N, just south of Cairo (w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omega Carinae
Omega Carinae, Latinized from ω Carinae, is a star in the constellation Carina. With a declination greater than 70 degrees south of the celestial equator, it is the most southerly of the bright stars of Carina (third-magnitude or brighter), and it is part of a southern asterism known as the Diamond Cross. This star has an apparent visual magnitude of 3.3 and is located at a distance of about from Earth. Properties Omega Carinae has a stellar classification of B8 IIIe, which places it in the category of Be stars, that display emission lines of hydrogen their spectrum. Omega Carinae is a shell star, having a circumstellar disk of gas surrounding its equator. The luminosity class of III indicates it has evolved into a giant star, having exhausted the hydrogen at its core and left the main sequence. The effective temperature of in its outer envelope is what gives this star the blue-white hue that is characteristic of B-type stars. This star is rotating rapidly with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delta Velorum
Delta Velorum (δ Velorum, abbreviated Delta Vel, δ Vel) is a triple star system in the southern constellation of Vela, near the border with Carina, and is part of the False Cross. Based on parallax measurements, it is approximately from the Sun. It is one of the stars that at times lies near the south celestial pole due to precession. δ Velorum consists of an eclipsing binary, designated Delta Velorum A, and a more distant third companion, Delta Velorum B. δ Velorum A's two components are themselves designated Aa (officially named Alsephina , the traditional name for the entire system) and Ab. Nomenclature ''δ Velorum'' ( Latinised to ''Delta Velorum'') is the system's Bayer designation. The designations of the two constituents as ''Delta Velorum A'' and ''B'', and those of ''A'' components—''Delta Velorum Aa'' and ''Ab''—derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the Internati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Well (Chinese Constellation)
The Well mansion (井宿, pinyin: Jǐng Xiù ; Japanese: chichiri-boshi) is one of the Twenty-eight mansions of the Chinese constellations. It is part of the southern mansions associated with the Vermilion Bird (Chinese constellation), Vermilion Bird, one of the Four Symbols of Chinese astronomy. The Well mansion is located in the constellation Gemini in Western astronomy and includes: ''Mu Geminorum (Tejat Posterior)'' - 井宿 (Jǐng Xiù yī), the first star of Well, ''Nu Geminorum'' - 井宿二(Jǐng Xiù èr), ''Xi Geminorum'' - 井宿三 (Jǐng Xiù sān), ''Epsilon Geminorum (Mebsuta)'' - 井宿四 (Jǐng Xiù sì), ''Zeta Geminorum (Mekbuda)'' - 井宿五 (Jǐng Xiù wǔ), ''Lambda Geminorum'' - 井宿六 (Jǐng Xiù liù), ''Kappa Geminorum'' - 井宿七 (Jǐng Xiù qī), ''Iota Geminorum'' - 井宿八 (Jǐng Xiù b) Asterisms References {{DEFAULTSORT:Well (Chinese Constellation) Chinese constellations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Language
Chinese ( or ) is a group of languages spoken natively by the ethnic Han Chinese majority and List of ethnic groups in China, many minority ethnic groups in China, as well as by various communities of the Chinese diaspora. Approximately 1.39 billion people, or 17% of the global population, speak a variety of Chinese as their first language. Chinese languages form the Sinitic languages, Sinitic branch of the Sino-Tibetan language family. The spoken varieties of Chinese are usually considered by native speakers to be dialects of a single language. However, their lack of mutual intelligibility means they are sometimes considered to be separate languages in a Language family, family. Investigation of the historical relationships among the varieties of Chinese is ongoing. Currently, most classifications posit 7 to 13 main regional groups based on phonetic developments from Middle Chinese, of which the most spoken by far is Mandarin Chinese, Mandarin with 66%, or around 800&nb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omicron2 Canis Majoris
Omicron2 Canis Majoris (ο2 CMa, ο2 Canis Majoris) is a star in the constellation Canis Major. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified. It has an apparent visual magnitude of 3.043, making it one of the brighter members of the constellation. Based upon a distance modulus of 10.2, it is about 3,600 light-years from Earth. Properties This is a massive supergiant star with a stellar classification of B3 Ia, indicating that, at the age of around 7 million years, it has exhausted the supply of hydrogen at its core and is now undergoing nuclear fusion of helium to generate energy. It has about 21 times the mass of the Sun and 65 times the Sun's radius. In all likelihood, it will end its life as a Type II supernova. Omicron2 Canis Majoris is one of the most luminous stars known, as it radiates about 220,000 times as much luminosity as the Sun from its outer envelope at a temperatu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eta Canis Majoris
Eta Canis Majoris (η Canis Majoris, abbreviated Eta CMa, η CMa), also named Aludra , is a blue supergiant star in the constellation of Canis Major. It has an apparent magnitude varying between 2.38 and 2.48, which makes it the fifth-brightest in the constellation and brightest stars. Parallax measurements from the Hipparcos mission give a large distance of 2,000 light-years. Nomenclature ''η Canis Majoris'' ( Latinised to ''Eta Canis Majoris'') is the star's Bayer designation. The traditional name ''Aludra'' originates from the Arabic: ''العذراء'' ''al-adhraa'', 'the virgin'. This star, along with Epsilon Canis Majoris (Adhara), Delta Canis Majoris (Wezen) and Omicron2 Canis Majoris (Thanih al Adzari), were ''Al 'Adhārā'' (''العذاري''), 'the Virgins'. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delta Canis Majoris
Delta Canis Majoris ( Latinised from δ Canis Majoris, abbreviated Delta CMa, δ CMa), officially named Wezen , is a star in the constellation of Canis Major. It is a yellow-white F-type supergiant with an apparent magnitude of +1.83. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified. Observation Delta Canis Majoris is the third-brightest star in the constellation after Sirius and ε Canis Majoris (Adhara), with an apparent magnitude of +1.83, and is white or yellow-white in colour. Lying about 10 degrees south southeast of Sirius, it only rises to about 11 degrees above the horizon at the latitude of the United Kingdom. The open cluster NGC 2354 is located only 1.3 degrees east of Delta Canis Majoris. As with the rest of Canis Major, Delta Canis Majoris is most visible in winter skies in the northern hemisphere, and summer skies in the southern. In Bayer's Uranometria, it is in the Great Dog's hind q ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
