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Encyclopedia > Vega
Vega

A mid-infrared image of the debris disk around Vega. Credit: Spitzer Space Telescope/NASA.
Observation data
Epoch J2000.0
Constellation Lyra
Right ascension 18h 36m 56.3s
Declination +38° 47' 01"
Apparent magnitude (V) 0.03
Characteristics
Spectral type A0V
U-B color index −0.01
B-V color index 0.00
Variable type Delta Scuti
Astrometry
Radial velocity (Rv) −13.5 km/s
Proper motion (μ) RA: 201.02 mas/yr
Dec.: 287.46 mas/yr
Parallax (π) 129.01 ± 0.52 mas
Distance 24.27 ly (7.751 pc)
Absolute magnitude (MV) 0.58
Details
Mass 2.6 M
Radius 2.73 R
Luminosity 51 L
Temperature 9,300 K
Metallicity 63%
Rotation 12.5 h
Age 3.5 × 108 years
Other designations
Alpha Lyrae, α Lyrae, 3 Lyr, GJ 721, HR 7001, BD +38°3238, HD 172167, GCTP 4293.00, LTT 15486, SAO 67174, HIP 91262

Vega (α Lyr / α Lyrae / Alpha Lyrae) is the brightest star in the constellation Lyra, the fifth brightest star in the sky and the second brightest star in the Northern celestial hemisphere, after Arcturus. It can often be seen near the zenith in the mid-northern latitudes during the evening in the Northern Hemisphere summer, and during these times from mid-southern latitudes it can be seen low above the northern horizon during the Southern Hemisphere winter. Vega can mean several things: // Vega, the brightest star in the constellation Lyra Vega program, a Soviet Venus-Halley space mission Vega (launcher), a planned European Space Agency launch system Vega (crater), a crater on the Moon Lockheed Vega, a six-passenger monoplane built by Lockheed in 1927 Vega Aircraft... Image File history File links Size of this preview: 600 × 600 pixel Image in higher resolution (709 × 709 pixel, file size: 23 KB, MIME type: image/jpeg) Source: http://www. ... Debris disk around star AU Microscopii. ... The Spitzer Space Telescope (formerly the Space Infrared Telescope Facility [SIRTF]) is an infrared space observatory, the fourth and final of NASAs Great Observatories. ... This article is about the American space agency. ... In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... It has been suggested that this article or section be merged into Julian epoch. ... This article does not cite any references or sources. ... For other uses, see Lyra (disambiguation). ... Equatorial Coordinates Right ascension (abbrev. ... In astronomy, declination (abbrev. ... 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. ... 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. ... In astronomy, the color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. ... In astronomy, the color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. ... This article or section contains a plot summary that is overly long or excessively detailed. ... A Delta Scuti variable is a variable star which exhibits variations in its luminosity due to both radial and non-radial pulsations of the stars surface. ... Illustration of the use of optical wavelength interferometry to determine precise positions of stars. ... Radial velocity is the velocity of an object in the direction of the line of sight. ... kilometre per second is an SI derived unit of both speed (scalar) and velocity (vector), signified by the symbol km/s or km s-1. ... The proper motion of a star is the motion of the position of the star in the sky (the change in direction in which we see it, as opposed to the radial velocity) after eliminating the improper motions of the stars, which affect their measured coordinates but are not real... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... A year (from Old English gÄ“r) is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... A year (from Old English gÄ“r) is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... This does not adequately cite its references or sources. ... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... Distance is a numerical description of how far apart objects are at any given moment in time. ... A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one year. ... A parsec is the distance from the Earth to an astronomical object which has a parallax angle of one arcsecond. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us, in the absence of interstellar extinction. ... This article or section is in need of attention from an expert on the subject. ... In astronomy, the solar mass is a unit of mass used to express the mass of stars and larger objects such as galaxies. ... Remote Authentication Dial In User Service (RADIUS) is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ... In astronomy, the solar radius is a unit of length used to express the size of stars and larger objects such as galaxies. ... This article does not cite any references or sources. ... The solar luminosity, , is a unit of luminosity (power emitted in the form of photons) conventionally used by astronomers to give the luminosities of stars. ... Fig. ... The kelvin (symbol: K) is a unit increment of temperature and is one of the seven SI base units. ... The globular cluster M80. ... This illustration shows the oblate appearance of the star Achernar caused by rapid rotation. ... The hour (symbol: h) is a unit of time. ... STAR is an acronym for: Organizations Society of Ticket Agents and Retailers], the self-regulatory body for the entertainment ticket industry in the UK. Society for Telescopy, Astronomy, and Radio, a non-profit New Jersey astronomy club. ... A year (from Old English gÄ“r) is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... A star catalogue, or star catalog, is an astronomical catalog that lists stars. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... The Henry Draper Catalogue is an astronomy catalogue with astrometric and spectroscopic data about more than 225,000 stars. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... Smithsonian Astrophysical Observatory Star Catalog contain the 258,996 stars. ... The Hipparcos and Tycho Catalogues (Tycho-1) are the primary products of the European Space Agencys astrometric mission, Hipparcos. ... Alpha (uppercase Α, lowercase α) is the first letter of the Greek alphabet. ... STAR is an acronym for: Organizations Society of Ticket Agents and Retailers], the self-regulatory body for the entertainment ticket industry in the UK. Society for Telescopy, Astronomy, and Radio, a non-profit New Jersey astronomy club. ... This article does not cite any references or sources. ... For other uses, see Lyra (disambiguation). ... Bright stars can be bright because they produce more light, because they are closer to us, or both. ... Arcturus (α Boo / α Boötis / Alpha Boötis) (IPA: ) is the brightest star in the constellation Boötes, and the third brightest star in the night sky, with a visual magnitude of −0. ... In broad terms, the zenith is the direction pointing directly above a particular location (perpendicular, orthogonal). ... Latitude,usually denoted symbolically by the Greek letter phi, , gives the location of a place on Earth north or south of the equator. ... Northern hemisphere highlighted in yellow. ... This article or section is in need of attention from an expert on the subject. ... southern hemisphere highlighted in yellow (Antarctica not depicted). ... Winter is one of the four seasons of temperate zones. ...


It is a "nearby star" at only 24.3 light years from Earth, and together with Arcturus and Sirius, one of the brightest stars in the Sun's neighborhood. It is one of the stars in the Local Bubble. A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one year. ... This article is about Earth as a planet. ... Arcturus (α Boo / α Boötis / Alpha Boötis) (IPA: ) is the brightest star in the constellation Boötes, and the third brightest star in the night sky, with a visual magnitude of −0. ... Sirius B redirects here. ... Sol redirects here. ... STARS can mean: Shock Trauma Air Rescue Society Special Tactics And Rescue Service, a fictional task force that appears in Capcoms Resident Evil video game franchise. ... The Local Bubble is a cavity in the local interstellar medium (ISM) at least 300 light years across containing a neutral hydrogen density that is approximately one tenth of that of the average ISM in the Milky Way (approximately 0. ...


Vega is a vertex of the Summer Triangle, which consists of Vega (in Lyra), Deneb (in Cygnus) and Altair (in Aquila). If one is to consider this asterism a right triangle, then Vega would correspond to its right angle. It is recognisable in the northern skies for there are few bright stars in its vicinity. In geometry, a vertex (plural vertices) is a special kind of point, usually a corner of a polygon, polyhedron, or higher dimensional polytope. ... 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. ... Deneb (α Cyg / α Cygni / Alpha Cygni) is the brightest star in the constellation Cygnus and one of the vertices of the Summer Triangle. ... Cygnus (Latin for swan) is a northern constellation. ... 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. ... Aquila (IPA: , Latin: ; 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. ... For alternate meanings, such as the musical instrument, see triangle (disambiguation). ... This article is about angles in geometry. ...


Its spectral class is A0V (Sirius, an A1V, is slightly less powerful) and it is firmly in the main sequence, fusing hydrogen to helium in its core. Since more powerful stars use their fusion fuel more quickly than smaller ones, Vega's lifetime is only one billion years, a tenth of our Sun's. Vega's current age is between 200 and 500 million years. Vega is twice as massive[1] as our Sun and burns at fifty times the power. 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. ... Hertzsprung-Russell diagram The main sequence of the Hertzsprung-Russell diagram is the curve where the majority of stars are located in this diagram. ... The deuterium-tritium (D-T) fusion reaction is considered the most promising for producing fusion power. ... General Name, Symbol, Number hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1, 1, s Appearance colorless Atomic mass 1. ... General Name, Symbol, Number helium, He, 2 Chemical series noble gases Group, Period, Block 18, 1, s Appearance colorless Standard atomic weight 4. ...


In about AD 14,000, Vega will become the North Star, owing to the precession of the equinoxes. Dionysius Exiguus invented Anno Domini years to date Easter. ... Polaris is not exactly at the celestial pole, as this time-exposure photo shows. ... The precession of Earths axis of rotation with respect to inertial space is also called the precession of the equinoxes. ...


Professional astronomers have used Vega for the calibration of absolute photometric brightness scales. When the magnitude scale was fixed, Vega happened to be close to zero magnitude. Therefore the visual magnitude of Vega was decided to be, by definition, zero at all wavelengths for many years (this is no longer the case, as the apparent magnitude zero point is now most commonly defined in terms of a particular numerically specified flux). It also has a relatively flat electromagnetic spectrum in the visual region (wavelength range 350-850 nanometers, most of which can be seen with the human eye), so the flux densities are roughly equal, 2000-4000 Jy. The flux density of Vega drops rapidly in the infrared, and is near 100 Jy at 5 micrometres. An astronomer or astrophysicist is a person whose area of interest is astronomy or astrophysics. ... Photometry is a technique of astronomy concerned with measuring the flux, or intensity of an astronomical objects electromagnetic radiation. ... 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. ... 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. ... Legend γ = Gamma rays HX = Hard X-rays SX = Soft X-Rays EUV = Extreme ultraviolet NUV = Near ultraviolet Visible light NIR = Near infrared MIR = Moderate infrared FIR = Far infrared Radio waves EHF = Extremely high frequency (Microwaves) SHF = Super high frequency (Microwaves) UHF = Ultra high frequency VHF = Very high frequency HF = High... In radio astronomy, the flux unit or jansky (symbol Jy) is a non-SI unit of electromagnetic flux equivalent to 10−26 watts per square metre per hertz. ... Image of two girls in mid-infrared (thermal) light (false-color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. ... A micrometre (American spelling: micrometer, symbol µm) is an SI unit of length equal to one millionth of a metre, or about a tenth of the diameter of a droplet of mist or fog. ...


The name Vega comes from the Arabic word waqi meaning "falling", via the phrase النسر الواقع an-nasr al-wāqi‘, translated "the swooping vulture". As part of the constellation Lyra it represents a jewel set in the body of the harp. Arabic ( or just ) is the largest living member of the Semitic language family in terms of speakers. ...


It is known as 织女星 (Zhìnǚxīng, the Star of the Weaver Girl) in Chinese, (See Qi Xi) and Vanand in Persian tradition. Qi Xi (Chinese: ; Pinyin: ; literally The Night of Sevens), sometimes called Chinese Valentines Day or Magpie Festival, falls on the seventh day of the seventh lunar month on the Chinese calendar; thus its name. ... Region and family of the old Armenia c. ... This article is about the Persian people, an ethnic group found mainly in Iran. ...

Contents

Rapid rotation

From the Earth, Vega is seen from within 5 degrees of its polar (rotation) axis, but if viewed along the plane of its equator, Vega would look about 20% fainter than at the poles.[2] This is because the star rotates at 93% of the speed that would cause it to start breaking up from centrifugal effects (with a rotation period of about 12.5 hours). The local gravitational acceleration at the poles is greater than at the equator so the local luminosity is higher (Von Zeipel theorem). This is seen as a variation in effective temperature over the star: polar temperature is near 10,000 K (17,500 °F), while equatorial temperature is 7,600 K (13,200 °F).[3] The expression centrifugal force is used to express that if an object is being swung around on a string the object seems to be pulling on the string. ... The von Zeipel theorem in astrophysics establishes a relationship between the nuclear brightness of a point on the surface of a rotating star and the local effective acceleration. ... The effective temperature of a star is the temperature of a black body with the same luminosity (L) as the star and is defined according to the Stefan-Boltzman law L = sigma T_{eff}^{4}. The effective temperature of our Sun is around 5,800 kelvins (K) and correspond to... The kelvin (symbol: K) is a unit increment of temperature and is one of the seven SI base units. ... The kelvin (symbol: K) is a unit increment of temperature and is one of the seven SI base units. ...


Astronomers are recalculating what the temperature would be for potential planets. A planet in a polar orbit around Vega would have a higher surface temperature than one in an equatorial orbit.


Possible planetary system

Artist concept illustrates how a massive collision of objects smashed together to create the dust ring around the star Vega

Vega has a disk of dust and gas around it, discovered by the IRAS satellite in the mid 1980s. This was initially thought to be a protoplanetary disk, but is now considered a "debris disk" due to the star's relatively young age of between 200 and 500 million years. In 1998 teams at the Joint Astronomy Centre and UCLA detected irregularities in it that suggest the presence of a planet.[4] Image File history File linksMetadata Download high resolution version (3000x2400, 2225 KB) Summary Source: [1] Image Credit: NASA/JPL-Caltech Image produced by: T. Pyle (SSC/Caltech) Licensing File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File linksMetadata Download high resolution version (3000x2400, 2225 KB) Summary Source: [1] Image Credit: NASA/JPL-Caltech Image produced by: T. Pyle (SSC/Caltech) Licensing File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... STAR is an acronym for: Organizations Society of Ticket Agents and Retailers], the self-regulatory body for the entertainment ticket industry in the UK. Society for Telescopy, Astronomy, and Radio, a non-profit New Jersey astronomy club. ... The Infrared Astronomical Satellite (IRAS) was a space-based observatory that performed a survey of the entire sky at infrared wavelengths. ... This article does not cite any references or sources. ... A protoplanetary disc (also protoplanetary disk, proplyd) is an accretion disc surrounding a T Tauri star. ... Debris disk around star AU Microscopii. ... Year 1998 (MCMXCVIII) was a common year starting on Thursday (link will display full 1998 Gregorian calendar). ... The Joint Astronomy Centre (JAC) operates British, Canadian and Dutch telescopes at Mauna Kea Observatory, and provides support for other telescopes and public outreach activities. ... Binomial name Ucla xenogrammus Holleman, 1993 The largemouth triplefin, Ucla xenogrammus, is a fish of the family Tripterygiidae and only member of the genus Ucla, found in the Pacific Ocean from Viet Nam, the Philippines, Palau and the Caroline Islands to Papua New Guinea, Australia (including Christmas Island), and the... An extrasolar planet, or exoplanet, is a planet beyond the Solar System. ...


Determining the nature of the planet has not been straightforward. A 2002 paper hypothesizes that the lumps are caused by a roughly Jupiter-mass planet on an eccentric orbit. [5]. A 2003 paper hypothesizes these lumps could be caused by a roughly Neptune-mass planet having migrated from 40 to 65 AU over 56 million years, [6] an orbit large enough to allow the formation of smaller rocky planets closer to Vega.[7]. Also see: 2002 (number). ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... Year 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... Planetary migration is the act of a stellar satellite altering its orbital parameters, especially semi-major axis, through various means during its lifetime. ... The astronomical unit (AU or au or a. ... A year (from Old English gēr) is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... The eight planets and three dwarf planets of the Solar System. ...


The habitable zone of Vega is centered around 7.1 AU. An Earthlike planet orbiting in the habitable zone will have an orbital period around 10.9 Earth years [citation needed] .


Cultural significance

The star has been the subject of many 'firsts' in Astronomy; in 1850 it became the first star to be photographed, and in 1872 the first to have its spectrum photographed. It was also debatably the first star to have its parallax measured, in the pioneering experiments of Friedrich Struve in 1837. Finally, it became the first star to have a car named after it, when Chevrolet launched the 'Vega' in 1971. For the game, see: 1850 (board game) 1850 (MDCCCL) was a common year starting on Tuesday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Sunday [1] of the 12-day-slower Julian calendar). ... Year 1872 (MDCCCLXXII) was a leap year starting on Monday (link will display the full calendar) of the Gregorian Calendar (or a leap year starting on Saturday of the 12-day slower Julian calendar). ... This does not adequately cite its references or sources. ... Friedrich Georg Wilhelm von Struve (1793-1864) Friedrich Georg Wilhelm von Struve (Russian: Vasily Yakovlevich Struve) (April 15, 1793 – November 23, 1864 (Julian calendar: November 11)) was a Baltic-German astronomer from a famous dynasty of astronomers. ... Queen Victoria, Queen of the United Kingdom (1837 - 1901) 1837 (MDCCCXXXVII) was a common year starting on Sunday (see link for calendar). ... Chevrolet (IPA: ʃɛv. ... Year 1971 (MCMLXXI) was a common year starting on Friday (link will display full calendar) of the 1971 Gregorian calendar. ...


In Chinese mythology, there is a love story of Qi Xi 七夕 in which Niu Lang 牛郎 (Altair) and his two children (β and γ Aquilae) are separated forever from their mother Zhi Nü 織女 (Vega) who is on the far side of the river, the Milky Way 銀河. The Japanese Tanabata festival is also based on this legend. Chinese mythology is a collection of cultural history, folktales, and religions that have been passed down in oral or written form. ... Qi Xi (Chinese: ; Pinyin: ; literally The Night of Sevens), sometimes called Chinese Valentines Day or Magpie Festival, 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. ... The star Alshain (Scientific Name Beta Aquilae) is located at right ascension 19h 55. ... TARAZED (Gamma Aquilae). ... For other uses, see Milky Way (disambiguation). ... People dressed in yukata at Tanabata Tanabata ), meaning Seven Evenings) is a Japanese star festival, derived from Obon traditions and the Chinese star festival, Qi Xi. ...


Medieval astrologers counted Vega as one of the Behenian stars and related it to chrysolite and winter savory. Cornelius Agrippa listed its kabbalistic sign under Vultur cadens, a literal Latin translation of the Arabic name. The Middle Ages formed the middle period in a traditional schematic division of European history into three ages: the classical civilization of Antiquity, the Middle Ages, and modern times. ... An astrological chart (or horoscope) _ Y2K Chart — This particular chart is calculated for January 1, 2000 at 12:01:00 A.M. Eastern Standard Time in New York City, New York, USA. (Longitude: 074W0023 - Latitude: 40N4251) Astrology (from Greek: αστρολ&#959... List of Behenian Stars Caput Algol (Algols head, associated with the head of Gorgona), Pleiades (actually, several stars), Aldebaran, Alhayhoch, Canis Maior (actually, a constellation, like the next one), Canis Minor, Cor Leonis (Hearth of the Lion), Cauda Urse (Tail of the Bear), Ala Corvi (Wing of the crow... Olivine The mineral olivine is a magnesium iron silicate with the formula (Mg,Fe)2SiO4 in which the ratio of magnesium and iron varies between the two endmembers of the series: forsterite (Mg-rich) and fayalite (Fe-rich). ... Binomial name Satureja montana Winter savory (Satureja montana) is a perennial herb native to warm temperate regions of the Northern Hemisphere. ... Cornelius Agrippa, as portrayed in Libri tres de occulta philosophia Heinrich Cornelius Agrippa von Nettesheim (born in Köln September 14, 1486 - died in Grenoble February 18, 1535) was a magician and occult writer, astrologer, and alchemist. ... The tree of life Kabbalah (קבלה Reception, Standard Hebrew Qabbala, Tiberian Hebrew Qabbālāh; also written variously as Cabala, Cabalah, Cabbala, Cabbalah, Kabala, Kabalah, Kabbala, Qabala, Qabalah) is a religious philosophical system claiming an insight into divine nature. ... Image File history File links After Agrippa File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...

See also: Vega in fiction

Vega (Alpha Lyrae), one of the brightest stars in the night sky, has appeared in many science fiction stories. ...

References

  1. ^ Peterson, Deane (2006). "Vega is a rapidly rotating star". Nature 13 April 2006.
  2. ^ Gulliver, A. F., Hill, G., and Adelman, S. J. 1994, Astrophysical Journal Letters, v. 429, pp. L81-L84. [1]
  3. ^ Peterson, Deane (2006). "Vega is a rapidly rotating star". Nature 13 April 2006 (preprint).
  4. ^ Joint Astronomy Centre, Hilo (April 21, 1998). Astronomers discover possible new Solar Systems in formation around the nearby stars Vega and Fomalhaut. Press Release.
  5. ^ Wilner, D., Holman, M., Kuchner, M., & Ho, P.T.P. (2002). "Structure in the Dusty Debris around Vega". "The Astrophysical Journal" 569, L115-L119. (Abstract)
  6. ^ Wyatt, M. (2003). "Resonant Trapping of Planetesimals by Planet Migration: Debris Disk Clumps and Vega's Similarity to the Solar System". The Astrophysical Journal 598, 1321-1340. (Abstract)
  7. ^ The Royal Observatory, Edinburgh (December 1, 2003). New evidence for Solar-like planetary system around nearby star. Press Release.

The Royal Observatory, Edinburgh (ROE) is located on Blackford Hill in the south of the city of Edinburgh. ...

External links

  • Vega. SolStation. Retrieved on November 9, 2005.
  • Coronagraphic Search for Extra-Solar Planets around epsilon Eri and Vega
  • Sir Harry Kroto, NL presents 8 Astrophysical Lectures including discussion of Vega Freeview videos provided by the Vega Science Trust.

  Results from FactBites:
 
Vega - Wikipedia, the free encyclopedia (2016 words)
Vega is the brightest star in Lyra, and the fifth brightest star in the sky.
Vega is a vertex of the Summer Triangle, which consists of Vega (in Lyra), Deneb (in Cygnus) and Altair (in Aquila).
The flux density of Vega drops rapidly in the infrared, and is near 100 Jy at 5 micrometres.
Vega program - Wikipedia, the free encyclopedia (1241 words)
Vega 1 made its closest approach on March 6, around 8,890 km from the nucleus, and Vega 2 made its closest approach on March 9 at 8,030 km.
Vega 1 made its closest approach to the comet on March 6 at a distance of 8,890 km.
Vega 2 flew in closer to the comet nucleus at a distance of 8,030 km on March 9, 1986.
  More results at FactBites »

 
 

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