Aquila (constellation)

Constellation on the celestial equator

Aquila is a constellation. The name means 'eagle' in Latin. The constellation is normally represented as an eagle.

Aquila
Constellation
Aquila
AbbreviationAql
GenitiveAquilae
Pronunciation/ˈækwɨlə/ Áquila, occasionally /əˈkwɪlə/; genitive /ˈækwɨliː/
Symbolismthe Eagle
Right ascension20
Declination+5
QuadrantNQ4
Area652 sq. deg. (22nd)
Main stars8
Bayer/Flamsteed
stars
65
Stars with planets7
Stars brighter than 3.00m3
Stars within 10.00 pc (32.62 ly)2
Brightest starAltair (α Aql) (0.77m)
Messier objects0
Meteor showersJune Aquilids
Epsilon Aquilids
Bordering
constellations
Sagitta
Hercules
Ophiuchus
Serpens Cauda
Scutum
Sagittarius
Capricornus
Aquarius
Delphinus
Visible at latitudes between +90° and −75°.
Best visible at 21:00 (9 p.m.) during the month of August.

Aquila is just a few degrees North of the celestial equator. The constellation is best seen in the summer as it is along the Milky Way. Because of this location along the line of our galaxy, many clusters and nebulae are within its borders. However, they are dim and there are not many galaxies.

History change

Aquila was one of the 48 constellations described by the 2nd century astronomer Ptolemy. It had been earlier mentioned by Eudoxus in the 4th century BC and Aratus in the 3rd century BC. It is now one of the 88 constellations defined by the International Astronomical Union.

The Greek Aquila is probably based on the Babylonian constellation of the Eagle (MUL.A.MUSHEN), which is in the same area as the Greek constellation.[1]

Novae change

Two major novae have been observed in Aquila. The first one was in 389 BC and was recorded as being as bright as Venus. The other was in 1918 and is known as (Nova Aquilae 1918). It briefly shone brighter than Altair, the brightest star in Aquila.

Deep-sky objects change

Three interesting planetary nebulae lie in Aquila:

Illustrations change

In illustrations of Aquila that represent it as an eagle, a nearly straight line of three stars symbolizes part of the wings. The center and brightest of these three stars is Altair. The tips of the wings spread out to the southeast and northwest. The head of the eagle stretches off to the southwest.[source?]

Mythology change

 
Aquila, with the now-obsolete figure of Antinous, as depicted in Urania's Mirror, a set of constellation cards published in London c.1825. At left is Delphinus.

In mythology, Aquila was owned by the Roman god Jupiter and did many tasks for him.

In a book by Gavin White, the Babylonian Eagle carried the constellation called the Dead Man (LU.USH) in its talons. The author also draws a comparison to the Classical stories of Antinous and Ganymede.[2]

In classical Greek mythology, Aquila was identified as Αετός Δίας (Aetos Dios). He was the eagle that carried the thunderbolts of Zeus. He was sent by Zeus to carry the shepherd boy Ganymede to Mount Olympus. The constellation of Aquarius is sometimes identified with Ganymede.[source?]

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.[source?]

In Hinduism, the constellation Aquila is identified with the half-eagle half-human deity Garuda.[source?]

Chinese astronomy change

In Chinese astronomy, ζ Aql is within the Heavenly Market Enclosure (天市垣, Tiān Shì Yuán), and the other stars of the constellation are placed within the Black Tortoise of the North (北方玄武, Běi Fāng Xuán Wǔ).

References change

  1. Babylonian Star-lore by Gavin White, Solaria Pubs, 2008, page 95
  2. Babylonian Star-lore by Gavin White, Solaria Pubs, 2008, page 92

Sources change

  This article includes text from the public domain 1911 Encyclopaedia Britannica. Please add to the article as needed.
  • Ian Ridpath and Wil Tirion (2007). Stars and Planets Guide, Collins, London. ISBN 978-0007251209. Princeton University Press, Princeton. ISBN 978-0691135564.

Other websites change