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Pollux (star)
Pollux is the brightest star in the constellation of Gemini. It has the Bayer designation β Geminorum, which is Latinised to Beta Geminorum and abbreviated Beta Gem or β Gem. This is an orange-hued, evolved giant star located at a distance of 34 light-years, making it the closest giant to the Sun. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified. In 2006 an extrasolar planet (designated Pollux b or β Geminorum b, later named Thestias) was confirmed to be orbiting it. Nomenclature ''β Geminorum'' ( Latinised to ''Beta Geminorum'') is the star's Bayer designation. The traditional name ''Pollux'' refers to the twins Castor and Pollux in Greek and Roman mythology. 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 of the first two batches ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemini (constellation)
Gemini is one of the constellations of the zodiac and is located in the northern celestial hemisphere. It was one of the 48 constellations described by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations today. Its name is Latin for ''twins'', and it is associated with the twins Castor and Pollux in Greek mythology. Its old astronomical symbol is (♊︎). Location Gemini lies between Taurus to the west and Cancer to the east, with Auriga and Lynx to the north, Monoceros and Canis Minor to the south and Orion to the south-west. In classical antiquity, Cancer was the location of the Sun on the first day of summer (June 21). During the first century AD, axial precession shifted it into Gemini. In 1990, the location of the Sun on the first day of summer moved from Gemini into Taurus, where it will remain until the 27th century AD and then move into Aries. The Sun will move through Gemini from June 21 to July 20 through 2062. Gemini i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IAU Working Group On Star Names
The International Astronomical Union (IAU) established a Working Group on Star Names (WGSN) in May 2016 to catalog and standardize proper names for stars for the international astronomical community. It operates under Division C – Education, Outreach and Heritage. The IAU states that it is keen to make a distinction between the terms ''name'' and ''designation''. To the IAU, ''name'' refers to the (usually colloquial) term used for a star in everyday conversation, while ''designation'' is solely alphanumerical, and used almost exclusively in official catalogues and for professional astronomy. (The WGSN notes that transliterated Bayer designations (e.g., Tau Ceti) are considered a special historical case and are treated as designations.) Terms of reference The terms of reference for the WGSN for the period 2016–2018 were approved by the IAU Executive Committee at its meeting on 6 May 2016. In summary, these are to: * establish IAU guidelines for the proposal and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Language
Chinese (, especially when referring to written Chinese) is a group of languages spoken natively by the ethnic Han Chinese majority and many minority ethnic groups in Greater China. About 1.3 billion people (or approximately 16% of the world's population) speak a variety of Chinese as their first language. Chinese languages form the Sinitic branch of the Sino-Tibetan languages family. The spoken varieties of Chinese are usually considered by native speakers to be variants of a single language. However, their lack of mutual intelligibility means they are sometimes considered separate languages in a 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 (with about 800 million speakers, or 66%), followed by Min (75 million, e.g. Southern Min), Wu (74 million, e.g. Shangh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leda (moon)
Leda , also known as , is a prograde irregular satellite of Jupiter. It was discovered by Charles T. Kowal at the Mount Palomar Observatory on September 14, 1974, after three nights' worth of photographic plates had been taken (September 11 through 13; Leda appears on all of them). It was named after Leda, who was raped by Zeus, the Greek equivalent of Jupiter (who came to her in the form of a swan). Kowal suggested the name and the IAU endorsed it in 1975. Leda belongs to the Himalia group, moons orbiting between 11 and 13 Gm from Jupiter at an inclination of about 27.5°. The orbital elements given here are as of January 2021, but they are continuously changing due to solar and planetary perturbations. See also *Jupiter's moons in fiction References External linksLeda OverviewbNASA's Solar System Exploration [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
38 Leda
Leda ( minor planet designation: 38 Leda) is a large, dark main-belt asteroid that was discovered by French astronomer J. Chacornac on January 12, 1856, and named after Leda, the mother of Helen of Troy in Greek mythology. In the Tholen classification system, it is categorized as a carbonaceous C-type asteroid, while the Bus asteroid taxonomy system lists it as a Cgh asteroid. The spectra of the asteroid displays evidence of aqueous alteration. Leda has been studied by radar. During 2002, 38 Leda was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 116 ± 13 km. This is consistent with the asteroid dimensions computed through other means. Based upon a light curve that was generated from photometric observations of this asteroid at Pulkovo Observatory, it has a rotation period of 12.834 ± 0.001 hours and varies in brightness by 0.15 ± 0.01 in magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thestius
In Greek mythology, Thestius (; Ancient Greek: Θέστιος) was a king of Pleuronians in Aetolia. He is not to be confused with Thespius, who was sometimes referred to as "Thestius". The patronymic "Thestias" may refer to one of his daughters, Leda or Althaea, and "Thestiades" to his son Iphiclus. Family Thestius was the son either of Ares by Demonice or Pisidice,Pseudo-Plutarch, ''De fluviis'22.1/ref> or of Agenor (son of Pleuron) possibly by Epicasta. He was the brother of Evenus, Pylus and Molus or of Demonice and Porthaon instead. Thestius was the father of Iphiclus by Leucippe or Eurythemis, daughter of Cleoboea, who was the mother of his other children, Althaea,Antoninus Liberalis2as cited in Nicander's ''Metamorphoses'' Eurypylus, Evippus, Hypermnestra, Leda and Plexippus. In other sources, the mother of Iphiclus, Althaea and Leda was named either Laophonte, daughter of Pleuron or Deidameia, daughter of Perieres. Other sons of Thestius were Cometes and Prothou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patronymic
A patronymic, or patronym, is a component of a personal name based on the given name of one's father, grandfather (avonymic), or an earlier male ancestor. Patronymics are still in use, including mandatory use, in many countries worldwide, although their use has largely been replaced by or transformed into patronymic surnames. Examples of such transformations include common English surnames such as Johnson (son of John). Origins of terms The usual noun and adjective in English is ''patronymic'', but as a noun this exists in free variation alongside ''patronym''. The first part of the word ''patronym'' comes from Greek πατήρ ''patēr'' "father" (GEN πατρός ''patros'' whence the combining form πατρο- ''patro''-); the second part comes from Greek ὄνυμα ''onyma'', a variant form of ὄνομα ''onoma'' "name". In the form ''patronymic'', this stands with the addition of the suffix -ικός (''-ikos''), which was originally used to form adjectives with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leda (mythology)
In Greek mythology, Leda (; Ancient Greek: Λήδα ) was an Aetolian princess who became a Spartan queen. According to Ovid, she was famed for her beautiful black hair and snowy skin. Her myth gave rise to the popular motif in Renaissance and later art of Leda and the Swan. Family Leda was the daughter of the Aetolian King Thestius hence she was also called Thestias. Her mother was either Leucippe, Deidameia, daughter of Perieres, Eurythemis, daughter of Cleoboea, or Laophonte, daughter of Pleuron.Alcman. ''Fragment 15'' as cited in ''Scholiast'' on Apollonius of Rhodes. ''Argonautica, 1.146'' According to Alcman, Leda's parents were Glaucus and Laophonte while Eumelus attested that they are Sisyphus and Panteiduia or Paneidyia. She married king Tyndareus of Sparta and by him became the mother of Helen of Troy, Clytemnestra, Castor, and Pollux (also called "Polydeuces"). Leda also had three other daughters by Tyndareus: Timandra, Phoebe, and Philonoe. Mythology Le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, smaller islands. With an area of , Australia is the largest country by area in Oceania and the world's List of countries and dependencies by area, sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a Megadiverse countries, megadiverse country, and its size gives it a wide variety of landscapes and climates, with Deserts of Australia, deserts in the centre, tropical Forests of Australia, rainforests in the north-east, and List of mountains in Australia, mountain ranges in the south-east. The ancestors of Aboriginal Australians began arriving from south east Asia approximately Early human migrations#Nearby Oceania, 65,000 years ago, during the Last Glacial Period, last i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TheSkyNet
''theSkyNet'' was a research project that used volunteer Internet-connected computers to carry out research in astronomy. It was an initiative of the International Centre for Radio Astronomy Research (ICRAR), a joint venture of Curtin University and the University of Western Australia. ''theSkyNet'' had two projects, Sourcefinder and POGS. Both projects have been completed. ''theSkyNet Sourcefinder'' aimed to test and refine automatic radio sourcefinding algorithms in preparation for radio galaxy surveys using the Australian Square Kilometre Array Pathfinder and the Square Kilometre Array. ''theSkyNet POGS'' used Spectral Energy Distribution fitting to calculate characteristics of many galaxies using images taken by the Pan-STARRS PS1 optical telescope in Hawaii. History ''theSkyNet Sourcefinder'' project was introduced publicly on 13 September 2011, operating on a Java-based user platform, processing data using new distributed computing software called Nereus. One year later, ''t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NameExoWorlds
NameExoWorlds (also known as IAU NameExoWorlds) is the name of various projects managed by the International Astronomical Union (I.A.U.) to encourage names to be submitted for astronomical objects, which would later be considered for official adoption by the organization. History The first such project (NameExoWorlds I), in 2015, regarded the naming of stars and exoplanets. 573,242 votes were submitted by members by the time the contest closed on October 31, 2015, and the names of 31 exoplanets and 14 stars were selected from these. Many of the names chosen were based on world history, mythology and literature. In June 2019, another such project (NameExoWorlds II), in celebration of the organization's hundredth anniversary, in a project officially called IAU100 NameExoWorlds, welcomed countries of the world to submit names for exoplanets and their host stars. A star with an exoplanet was assigned to each country, and members of the public submitted names for them. In August 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Percy Shelley
Percy Bysshe Shelley ( ; 4 August 17928 July 1822) was one of the major English Romantic poets. A radical in his poetry as well as in his political and social views, Shelley did not achieve fame during his lifetime, but recognition of his achievements in poetry grew steadily following his death and he became an important influence on subsequent generations of poets including Robert Browning, Algernon Charles Swinburne, Thomas Hardy, and W. B. Yeats. American literary critic Harold Bloom describes him as "a superb craftsman, a lyric poet without rival, and surely one of the most advanced sceptical intellects ever to write a poem." Shelly's reputation fluctuated during the 20th century, but in recent decades he has achieved increasing critical acclaim for the sweeping momentum of his poetic imagery, his mastery of genres and verse forms, and the complex interplay of sceptical, idealist, and materialist ideas in his work. Among his best-known works are "Ozymandias" (1818), "Ode to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
