Vela (constellation)

--207.190.183.254 (talk) 15:20, 26 February 2013 (UTC)--207.190.183.254 (talk) 15:20, 26 February 2013 (UTC)unjfdvbfelhv

Vela

Constellation
List of stars in Vela
Abbreviation	Vel
Genitive	Velorum
Pronunciation	/ˈviːlə/, genitive /vˈlɔːrəm/
Symbolism	the Sails
Right ascension	9
Declination	−50
Quadrant	SQ2
Area	500 sq. deg. (32nd)
Main stars	5
Bayer/Flamsteed stars	50
Stars with planets	7
Stars brighter than 3.00m	5
Stars within 10.00 pc (32.62 ly)	2
Brightest star	γ Vel (1.75m)
Messier objects	0
Meteor showers	Delta Velids Gamma Velids Puppid-velids
Bordering constellations	Antlia Pyxis Puppis Carina Centaurus
Visible at latitudes between +30° and −90°. Best visible at 21:00 (9 p.m.) during the month of March.

Vela is a constellation in the southern sky. Its name is Latin for the sails of a ship, and it was originally part of a larger constellation, the ship Argo Navis, which was later divided into three parts, the others being Carina and Puppis.

Notable features

Argo was sub-divided in 1752 by the French astronomer Nicolas Louis de Lacaille, forming Vela. Despite the division, Lacaille kept Argo's Bayer designations. Therefore Carina has the α, β and ε, Vela has γ and δ, Puppis has ζ, and so on.

Stars

The brightest star in the constellation, γ Velorum, is a bright 1.75^m supergiant star. The star is actually quintuple, and the primary component is famous for being the brightest Wolf–Rayet star in the sky. γ Velorum is also sometimes called Regor.

κ Velorum is also called Markeb.

False Cross

The False Cross is an asterism formed of the stars δ Velorum and κ Velorum and ι Carinae and ε Carinae. It is so called because it is sometimes mistaken for the Southern Cross, causing errors in astronavigation.

Deep-sky objects

Of the deep-sky objects of interest in Vela is a planetary nebula known as the NGC 3132 (nicknamed Eight-burst Nebula). This constellation has 32 more planetary nebulae.

Also of interest is the Vela Supernova Remnant. This is the nebula of a supernova explosion which is believed to have been visible from the Earth around 10,000 years ago. The remnant contains a pulsar which was the first pulsar to be identified optically.

The Gum Nebula is a faint emission nebula, believed to be the remains of a million-year-old supernova.

Vela is referenced in the Astronomy Picture of the Day (APOD) for 2011 September 5: http://apod.nasa.gov/apod/ap110905.html for "HH 47: A Young Star Jet Expands" located in Vela.

NGC 2670 is an open cluster located in Vela. It has an overall magnitude of 7.8 and is 3200 light-years from Earth. The stars of NGC 2670, a Trumpler class II 2 p and Shapley class d cluster, are in a conformation suggesting a bow and arrow. Its class indicates that it is a poor, loose cluster, though detached from the star field. It is somewhat concentrated at its center, and its less than 50 stars range moderately in brightness.

References

• Levy, David H. (2005), Deep Sky Objects, Prometheus Books, ISBN 1-59102-361-0
• Ian Ridpath and Wil Tirion (2007). Stars and Planets Guide, Collins, London. ISBN 978-0-00-725120-9. Princeton University Press, Princeton. ISBN 978-0-691-13556-4.
• Richard Hinckley Allen, Star Names, Their Lore and Legend, New York, Dover, various dates.

External links

• Star Tales – Vela