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Asterope (star)
The Sterope or Asterope system is a double star in the zodiac constellation of Taurus. Its components have the Flamsteed designations 21 Tauri and 22 Tauri, and are sometimes known as Sterope I and Sterope II, respectively. The International Astronomical Union applies the name ''Asterope'' specifically to 21 Tauri. The two stars are thus * 21 Tauri (or Sterope I, formally Asterope) * 22 Tauri (or Sterope II) The two stars are separated by 0.047° on the sky, which is equal to 2.82 arc-minutes and thus closer than the usual naked-eye resolution limit of 4 arc-min, giving an elongated appearance of the two together. Both are members of the Pleiades open star cluster ( M45) and approximately 440 light-years from the Sun. Nomenclature Asterope was one of the Pleiades sisters in Greek mythology. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalogue and standardize proper names for stars. The WGSN decided to attribute prope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light-year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 (one million million, or billion in long scale). As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). Because it includes the time-measurement word "year", the term ''light-year'' is sometimes misinterpreted as a unit of time. The ''light-year'' is most often used when expressing distances to stars and other distances on a galactic scale, especially in non-specialist contexts and popular science publications. The unit most commonly used in professional astronomy is the parsec (symbol: pc, about 3.26 light-years) which derives from astrometry; it is the distance at which one astronomical unit subtends an angle of one second of arc. Defini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taurus (Chinese Astronomy)
According to traditional Chinese uranography, the modern constellation Taurus is located within the western quadrant of the sky, which is symbolized as the White Tiger of the West (西方白虎) (''Xī Fāng Bái Hǔ''). The name of the western constellation in modern Chinese is 金牛座 (''jīn niú zuò''), meaning "the golden bull constellation". Stars The map of Chinese constellation in constellation Taurus area consists of: See also *Traditional Chinese star names *Chinese constellations Traditional Chinese astronomy has a system of dividing the celestial sphere into asterisms or constellations, known as "officials" (Chinese ''xīng guān''). The Chinese asterisms are generally smaller than the constellations of Hellenistic t ... References {{reflist External linksTaurus – Chinese associations香港太空館https://web.archive.org/web/20120813070951/http://www.lcsd.gov.hk/CE/Museum/Space/Research/c_index.htm 研究資源] *中國星區、星官及星名英譯表 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleiades In Folklore And Literature
High visibility of the star cluster Pleiades in the night sky and its position along the ecliptic (which approximates to the solar system's common planetary plane) has given it importance in many cultures, ancient and modern. Its heliacal rising, which moves through the seasons over millennia (see precession) was nonetheless a date of folklore or ritual for various ancestral groups, so too its yearly heliacal setting. As noted by scholar Stith Thompson, the constellation was "nearly always imagined" as a group of seven sisters, and their myths explain why there are only six. Some scientists suggest that these may come from observations back when Pleione was further from Atlas and more visible as a separate star as far back as 100,000 BC. North Africa Berber people Tuareg Berbers of the northern Sahara call the Pleiades ''Cat iheḍ'' (pronounced: shat ihed) (or ''-ahăḍ''). This Berber name means: "daughters of the night". To many other Berbers it is Tagemmunt ("the grou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IC 1838
IC 1838 (also known as MCG+03-08-002 or LEDA 10389) is a spiral galaxy of type Sc. It lies in the Taurus constellation, 471 million light years A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ... away from Earth. It has a diameter of 13,046.5 light years and a thickness of 1,304.7 light years. References External linksDeep-Sky Catalogue Unbarred spiral galaxies Taurus (constellation) 1838 10389 +03-08-002 {{Spiral-galaxy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crater Class Cargo Ship
The ''Crater''-class cargo ship were converted EC2-S-C1 type, Liberty ship, Liberty cargo ships, constructed by the United States Maritime Commission (USMC) for use by the United States Navy, US Navy during World War II. The designation 'EC2-S-C1': 'EC' for Emergency Cargo, '2' for a ship between long (Waterline length, Load Waterline Length), 'S' for steam engines, and 'C1' for design C1. The class was named for the lead ship of its type, , with most ships in the class being named for astronomical bodies. Its 65 hulls were among the largest US Navy cargo ship classes. The ships were propelled by a reciprocating steam engine using a single screw with a power of shaft. Notable incidents *USS Aludra (AK-72), USS ''Aludra'' (AK-72) Lost in action from Empire of Japan, Japanese torpedo on 23 June 1943 south of Makira island. *USS Deimos (AK-78), USS ''Deimos'' (AK-78) Damaged by torpedo, 23 June 1943, then abandoned and scuttled south of Makira island. References External lin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of its active battle fleet alone exceeding the next 13 navies combined, including 11 allies or partner nations of the United States as of 2015. It has the highest combined battle fleet tonnage (4,635,628 tonnes as of 2019) and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction, and five other carriers planned. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the United States Navy is the third largest of the United States military service branches in terms of personnel. It has 290 deployable combat vessels and more than 2,623 operational aircraft . The United States Navy traces its origins to the Continental Navy, which was established during the American Revo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Sterope (AK-96)
USS Sterope (AK-96) was a commissioned by the U.S. Navy for service in World War II. She was responsible for delivering troops, goods and equipment to locations in the war zone. Construction Originally named SS ''James Wilson'' (MC hull 183) after Founding Father James Wilson, she was laid down on 9 December 1941, by the Oregon Shipbuilding Co., Portland, Oregon; launched on 22 February 1942; sponsored by Mrs. John Spady; acquired by the Navy on 27 March 1943; and commissioned on 14 May 1943. World War II Pacific Theatre operations ''Sterope'' was converted to Navy specifications by the Los Angeles Shipbuilding and Drydock Co., and completed her shakedown cruise on 10 June. The ship --- assigned to the Naval Transportation Service ---proceeded to San Francisco, California, loaded, and sailed on 24 June for New Caledonia. ''Sterope'' arrived at Noumea on 16 July 1943 and, for the next two years, shuttled supplies to advanced bases as a part of the Service Force, Pacific Fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multiple Star
A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction. A large group of stars bound by gravitation is generally called a ''star cluster'' or ''galaxy'', although, broadly speaking, they are also star systems. Star systems are not to be confused with planetary systems, which include planets and similar bodies (such as comets). A star system of two stars is known as a ''binary star'', ''binary star system'' or ''physical double star''. If there are no tidal effects, no perturbation from other forces, and no transfer of mass from one star to the other, such a system is stable, and both stars will trace out an elliptical orbit around the barycenter of the system indefinitely. ''(See Two-body problem)''. Examples of binary systems are Sirius, Procyon and Cygnus X-1, the last of which probably consists of a star and a black hole. Multiple star systems A multiple star system consists of three or more stars that appear f ... [...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] |
Greek Mythology
A major branch of classical mythology, Greek mythology is the body of myths originally told by the Ancient Greece, ancient Greeks, and a genre of Ancient Greek folklore. These stories concern the Cosmogony, origin and Cosmology#Metaphysical cosmology, nature of the world, the lives and activities of List of Greek mythological figures, deities, Greek hero cult, heroes, and List of Greek mythological creatures, mythological creatures, and the origins and significance of the ancient Greeks' own cult (religious practice), cult and ritual practices. Modern scholars study the myths to shed light on the religious and political institutions of ancient Greece, and to better understand the nature of myth-making itself. The Greek myths were initially propagated in an oral tradition, oral-poetic tradition most likely by Minoan civilization, Minoan and Mycenaean Greece, Mycenaean singers starting in the 18th century BC; eventually the myths of the heroes of the Trojan War and its after ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleiades (Greek Mythology)
The Pleiades (; grc-gre, Πλειάδες, Ancient Greek pronunciation: ), were the seven sister-nymph, nymphs, companions of Artemis, the goddess of the hunt. Together with their seven sisters, the Hyades (mythology), Hyades, they were called the Atlantides, Dodonides, or Nysiads, Nysiades, nursemaids and teachers of the infant Dionysus. The Pleiades were thought to have been translated to the night sky as a cluster of stars, the Pleiades, and were associated with rain. Etymology The name Pleiades ostensibly derived from the name of their mother, Pleione, effectively meaning "daughters of Pleione". However, the name of the star-cluster likely came first, and Pleione was invented to explain it. According to another suggestion ''Pleiades'' derived from πλεῖν (''plein'' , "to sail") because of the cluster's importance in delimiting the sailing season in the Mediterranean Sea: "the season of navigation began with their heliacal rising". Family The Pleiades' parents were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
