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Encyclopedia > Aquila (constellation)
Aquila
Aquila
Click for larger image
List of stars in Aquila
Abbreviation: Aql
Genitive: Aquilae
Symbology: the Eagle
Right ascension: 20 h
Declination: +5°
Area: 652 sq. deg. (22nd)
Main stars: 8
Bayer/Flamsteed stars: 61
Stars with known planets: 4
Bright stars: 3
Nearby stars: 3
Brightest star: Altair (α Aql) (0.77m)
Nearest star: Altair (α Aql) (16.72 ly)
Messier objects: 0
Meteor showers: June Aquilids
Epsilon Aquilids
Bordering constellations: Sagitta
Hercules
Ophiuchus
Serpens Cauda
Scutum
Sagittarius
Capricornus
Aquarius
Delphinus
Visible at latitudes between +85° and −75°
Best visible at 21:00 (9 p.m.) during the month of August

Aquila (IPA: /əˈkwɪlə, ˈakwələ/, Latin: eagle; sometimes named the Vulture), is one of the 48 constellations listed by Ptolemy, also mentioned by Eudoxus (4th century BC) and Aratus (3rd century BC) and now also part of the list of 88 constellations acknowledged by the IAU. It lies roughly at the celestial equator. The alpha star, Altair, is a vertex of the Summer Triangle asterism. This is a celestial map of the constellation Aquila the Eagle. ... This is the list of notable stars in the constellation Aquila, sorted by decreasing brightness. ... The genitive case is a grammatical case that indicates a relationship, primarily one of possession, between the noun in the genitive case and another noun. ... Genera Several, see below. ... Equatorial Coordinates Right ascension (abbrev. ... In astronomy, declination (abbrev. ... Here is a list of the 88 modern constellations by their area in the sky, measured in square degrees. ... This article or section is not written in the formal tone expected of an encyclopedia article. ... Flamsteed designations for stars are similar to Bayer designations, except that they use numbers instead of Greek letters. ... Altair (α Aql / α Aquilae / Alpha Aquilae / Atair ) is the brightest star in the constellation Aquila and the twelfth brightest star in the nighttime sky, at visual magnitude 0. ... The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ... Altair (α Aql / α Aquilae / Alpha Aquilae / Atair ) is the brightest star in the constellation Aquila and the twelfth brightest star in the nighttime sky, at visual magnitude 0. ... A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one year. ... The Messier objects are a set of astronomical objects catalogued by Charles Messier in his catalogue of Nebulae and Star Clusters first published in 1774. ... Leonid Meteor Shower A meteor shower, also known as a meteor storm, is a celestial event where a large number of meteors are seen within a very short period. ... This article is about the constellation; for the trigonometric function, see versine. ... Hercules (IPA: ) is the fifth largest of the 88 modern constellations. ... Ophiuchus (IPA: ), formerly referred to as Serpentarius (IPA: ), both originating in the Greek language and meaning serpent-holder, is one of the 88 constellations and was also one of the 48 listed by Ptolemy. ... Serpens (the snake) is one of the 88 modern constellations, and was also one of the 48 listed by Ptolemy. ... Scutum (Latin for shield) is a small constellation. ... For other uses, see Sagittarius. ... Capricornus ( or , Unicode: ♑), a name meaning Horned Goat or That which has horns like a goats in Latin, is one of the constellations of the zodiac. ... Aquarius (IPA: , Latin: ) is the eleventh sign of the zodiac, situated between Capricornus and Pisces. ... Delphinus, being Latin for Dolphin, is a rather small (ranked 69th) northern constellation very close to the celestial equator. ... Articles with similar titles include the NATO phonetic alphabet, which has also informally been called the “International Phonetic Alphabet”. For information on how to read IPA transcriptions of English words, see IPA chart for English. ... Latin was the language originally spoken in the region around Rome called Latium. ... Genera Several, see below. ... This article or section does not adequately cite its references or sources. ... A medieval artists rendition of Claudius Ptolemaeus Claudius Ptolemaeus (Greek: ; ca. ... Eudoxus of Cnidus (Greek Εύδοξος) (410 or 408 BC – 355 or 347 BC) was a Greek astronomer, mathematician, physician, scholar and friend of Plato. ... Aratus (Greek Aratos) (ca. ... Logo of the IAU The International Astronomical Union (French: Union astronomique internationale) unites national astronomical societies from around the world. ... The celestial equator is a great circle on the imaginary celestial sphere, which could be constructed by inflating the Earths equator until it intersects with said sphere. ... Altair (α Aql / α Aquilae / Alpha Aquilae / Atair ) is the brightest star in the constellation Aquila and the twelfth brightest star in the nighttime sky, at visual magnitude 0. ... Look up vertex in Wiktionary, the free dictionary. ... The Summer Triangle is an astronomical asterism involving an imaginary triangle drawn on the northern hemispheres celestial sphere, with its defining vertices at Altair, Deneb, and Vega. ... In astronomy, an asterism is a pattern of stars seen in Earths sky which is not an official constellation. ...


Ptolemy catalogued nineteen stars jointly in this constellation and in the constellation Antinous, which was named in the reign of the emperor Hadrian (AD 117–138), but sometimes, and wrongly, attributed to Tycho Brahe, who catalogued twelve stars in Aquila and seven in Antinous; Hevelius determined twenty-three stars in the first, and nineteen in the second. Antinous was a constellation south of Aquila. ... Publius Aelius Traianus Hadrianus (January 24, 76 – July 10, 138), known as Hadrian in English was Roman emperor from 117 – 138, as well as a Stoic and Epicurean philosopher. ... Tycho Brahe Monument of Tycho Brahe and Johannes Kepler in Prague Tycho Brahe, born Tyge Ottesen Brahe (December 14, 1546 – October 24, 1601), was a Danish nobleman from the region of Scania (in modern-day Sweden), best known today as an early astronomer, though in his lifetime he was also... Johannes Hevelius Johannes Hevelius (Latin), also called Johann Hewelke, Johannes Höwelcke or Johannes Hewel (in German), or Jan Heweliusz (in Polish), (born January 28, 1611 – died January 28, 1687), was a councillor and mayor in Danzig (GdaÅ„sk). ...

Contents

Notable features

Aquila, which lies in the Milky Way, contains many rich starfield. It has been suggested that Andromeda-Milky Way collision be merged into this article or section. ...

  • α Aql (Altair): this multiple star system (3 components) has 0.77m and is of spectral type A7 V. It has a parallax of 0.23", and consequently is about eight times as bright as the sun.
  • β Aql (Alshain): its spectral type is G8 IV and it shines with an apparent brightness of 3.71m. Like Altair, it too is a multiple star system with three components.
  • γ Aql (Tarazed): spectral type K3 II; 2.72m
  • η Aql: This short-period variable star is one of the brightest classical Cepheids; its brightness varies between 3.48 mag and 4.39 mag every 7.177 days.
  • 15 Aql: This double star is a yellow K star of 5.4 mag accompanied by a 7th mag star; it can easily be observed with small telescopes.

Altair (α Aql / α Aquilae / Alpha Aquilae / Atair ) is the brightest star in the constellation Aquila and the twelfth brightest star in the nighttime sky, at visual magnitude 0. ... The star Alshain (Scientific Name Beta Aquilae) is located at right ascension 19h 55. ... TARAZED (Gamma Aquilae). ... Eta Aquilae (η Aql / η Aquilae) is a star in the constellation Aquila. ... Most stars are of almost constant luminosity. ... Cepheid in the Spiral Galaxy M100 A Cepheid variable or Cepheid is a member of a particular class of variable stars, notable for a fairly tight correlation between their period of variability and absolute luminosity. ... The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ... 15 Aquilae is a double star in the constellation Aquila. ... When two stars are so nearly in the same direction as seen from Earth that they appear to be a single star to the naked eye but may be separated by the use of telescopes, they are referred to as a double star. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ...

Notable deep-sky objects

Three interesting planetary nebulae lie in Aquila: NGC 6543, the Cats Eye Nebula A planetary nebula is an astronomical object consisting of a glowing shell of gas and plasma formed by certain types of stars at the end of their lives. ...

More deep-sky objects: NGC 6781 is a planetary nebulae[1] located in the constellation Aquila. ... The Owl Nebula (also known as Messier Object 97 or NGC 3587) is a planetary nebula in the constellation Ursa Major. ... Ursa Major (IPA: ) is a constellation visible throughout the year in most of the northern hemisphere. ... NGC 6751 is a planetary nebula in the constellation Aquila. ...

NGC 6709 is an open cluster in the in the constellation Aquila. ... The Pleiades is one of the most famous open clusters. ... NGC 6755 is an open cluster in the in the constellation Aquila. ... The Pleiades is one of the most famous open clusters. ... NGC 6760 is a an globular cluster[1] in the constellation Aquila. ... The Globular Cluster M80 in the constellation Scorpius is located about 28,000 light years from the Sun and contains hundreds of thousands of stars. ... The Pleiades is one of the most famous open clusters. ...

History

Two major novae have been observed in Aquila; the first one was in 389 BC and was recorded to be as bright as Venus, the other (Nova Aquilae 1918) briefly shone brighter than Altair. Depictied as an eagle, Aquila is named for the bird that belonged to Zeus. Aquila's most famous task was carrying the mortal Ganymede to the heavens to serve as Zeus' cup bearer. Two major novae have been observed in Aquila. The first one was in 389 AD and was recorded to be as bright as Venus. The other shone brighter than Altair, the brightest star in Aquila. A nova is what the ancients called a "new star." In reality, it is not a new star at all, but a very old one that suddenly becomes bright again, regaining some of the former glory of its youth. Note that there is a very strong difference between a nova (an old star brightening temporarily) and a supernova (a massive star exploding). Artists conception of a white dwarf star accreting hydrogen from a larger companion A nova (pl. ... Centuries: 5th century BC - 4th century BC - 3rd century BC Decades: 430s BC 420s BC 410s BC 400s BC 390s BC - 380s BC - 370s BC 360s BC 350s BC 340s BC 330s BC 394 BC 393 BC 392 BC 391 BC 390 BC 389 BC 388 BC 387 BC 386... V603 Aquilae (or Nova Aquilae 1918) was a bright nova occuring in Aquila in 1918. ...


Mythology

The constellation resembles a wide winged, soaring, short necked, bird, which the ancients identified as an eagle [1]. In classical Greek mythology, it was identified as the eagle which carried the thunderbolts of Zeus and was sent by him to carry the shepherd boy Ganymede who he desired, represented by the neighbouring Aquarius, to Mount Olympus where he became the wine-pourer for all the gods. This explains why the largest moon of Jupiter was called Ganymede, Jupiter being the Roman name of Zeus. The bust of Zeus found at Otricoli (Sala Rotonda, Museo Pio-Clementino, Vatican) Greek mythology is the body of stories belonging to the ancient Greeks concerning their gods and heroes, the nature of the world and their own cult and ritual practices. ... The Statue of Zeus at Olympia Phidias created the 12-m (40-ft) tall statue of Zeus at Olympia about 435 BC. The statue was perhaps the most famous sculpture in Ancient Greece, imagined here in a 16th century engraving Zeus (in Greek: nominative: Zeús, genitive: Diós), is... In Greek mythology, Ganymede (Greek: Γανυμήδης, Ganumêdês)) was a divine hero whose homeland was the Troad. ... Aquarius (IPA: , Latin: ) is the eleventh sign of the zodiac, situated between Capricornus and Pisces. ... This article refers to a mountain in Greece. ... A natural satellite is an object that orbits a planet or other body larger than itself and which is not man-made. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... This article or section does not adequately cite its references or sources. ...


This constellation was also known as Vultur volans to the Romans, not to be confused with Vultur cadens which was the Romans' name for what is now known as Lyra. Ancient Rome was a civilization that grew from a small agricultural community founded on the Italian Peninsula circa the 9th century BC to a massive empire straddling the Mediterranean Sea. ... For other uses, see Lyra (disambiguation). ...


Aquila, together with other constellations in the Zodiac sign of Sagittarius (specifically, Lyra, Cygnus), may be a significant part of the origin of the myth of the Stymphalian birds, one of The Twelve Labours of Herakles. It has been suggested that this article be split into multiple articles. ... For other uses, see Sagittarius. ... For other uses, see Lyra (disambiguation). ... Cygnus (Latin for swan) is a northern constellation. ... In Greek mythology, the Stymphalian Birds were birds with claws of brass and sharp metallic feathers they could launch at their victims, and also they were Ares pets. ... Hercules and the Hydra by Antonio Pollaiuolo The Twelve Labours (Greek: dodekathlos) of Heracles (Latin: Hercules) are a series of archaic episodes connected by a later continuous narrative, concerning a penance carried out by Heracles, the greatest of the Greek heroes. ... For the son of Alexander the Great, see Heracles (Macedon). ...


In the Chinese love story of Qi Xi, Niu Lang (Altair) and his two children (β and γ Aquilae) are separated forever from their wife and mother Zhi Nu (Vega) who is on the far side of the river, the Milky Way. Qi Xi (七夕; Pinyin: qÄ« xÄ«; The Night of Sevens), sometimes called Chinese Valentines Day, falls on the seventh day of the seventh lunar month on the Chinese calendar; thus its name. ... Altair (α Aql / α Aquilae / Alpha Aquilae / Atair ) is the brightest star in the constellation Aquila and the twelfth brightest star in the nighttime sky, at visual magnitude 0. ... Vega (α Lyr / α Lyrae / Alpha Lyrae) is the brightest star in the constellation Lyra, and the fifth brightest star in the sky. ... It has been suggested that Andromeda-Milky Way collision be merged into this article or section. ...


See also

This is the list of notable stars in the constellation Aquila, sorted by decreasing brightness. ...

References

  • This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain.

Encyclopædia Britannica, the 11th edition The Encyclopædia Britannica Eleventh Edition (1910–1911) is perhaps the most famous edition of the Encyclopædia Britannica. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ...

External links

Wikimedia Commons has media related to:
Aquila
The 88 modern Constellations
Andromeda • Antlia • Apus • Aquarius • Aquila • Ara • Aries • Auriga • Boötes • Caelum • Camelopardalis • Cancer • Canes Venatici • Canis Major • Canis Minor • Capricornus • Carina • Cassiopeia • Centaurus • Cepheus • Cetus • Chamaeleon • Circinus • Columba • Coma Berenices • Corona Australis • Corona Borealis • Corvus • Crater • Crux • Cygnus • Delphinus • Dorado • Draco • Equuleus • Eridanus • Fornax • Gemini • Grus • Hercules • Horologium • Hydra • Hydrus • Indus • Lacerta • Leo • Leo Minor • Lepus • Libra • Lupus • Lynx • Lyra • Mensa • Microscopium • Monoceros • Musca • Norma • Octans • Ophiuchus • Orion • Pavo • Pegasus • Perseus • Phoenix • Pictor • Pisces • Piscis Austrinus • Puppis • Pyxis • Reticulum • Sagitta • Sagittarius • Scorpius • Sculptor • Scutum • Serpens • Sextans • Taurus • Telescopium • Triangulum • Triangulum Australe • Tucana • Ursa Major • Ursa Minor • Vela • Virgo • Volans • Vulpecula

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