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* Alpha, the brightest star in a constellation according to the Bayer designation
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Alpha and brightest
Arcturus (; α Boo, α Boötis, Alpha Boötis ) is the brightest star in the constellation Boötes and in fact the northern celestial hemisphere.
With a visual magnitude of − 0. 04, it is the fourth brightest star in the night sky, after − 1. 46 magnitude Sirius, − 0. 86 magnitude Canopus, and − 0. 27 magnitude Alpha Centauri.
This makes Arcturus the third brightest individual star, just ahead of Alpha Centauri A ( α Cen A ), whose visual magnitude is − 0. 01.
Antares ( α Scorpii, α Sco, Alpha Scorpii ) is a red supergiant star in the Milky Way galaxy and the sixteenth brightest star in the nighttime sky.
Altair ( Alpha Aquilae, Alpha Aql, α Aquilae, α Aql, Atair ) is the brightest star in the constellation Aquila and the twelfth brightest star in the night sky.
Since in a majority of constellations the brightest star is designated Alpha ( α ), many people wrongly assume that Bayer meant to put the stars exclusively in order of their brightness, but in his day there was no way to measure stellar brightness precisely.
Of the 88 modern constellations, there are at least 30 in which " Alpha " is not the brightest star, and four of those lack an alpha star altogether.
In addition to Alpha Centauri ( the 3rd brightest star in the sky ), a second first magnitude star, Beta Centauri, is part of Centaurus.
Alpha Cygni, called Deneb, is the brightest star in Cygnus.
* Canopus ( or Alpha Carinae ), the brightest star in the southern constellation of Carina
The main asterism in Delphinus is Job's Coffin, formed from the four brightest stars: Alpha, Beta, Gamma, and Delta Delphini.
The brightest star in Equuleus is Alpha Equulei, traditionally called Kitalpha, a yellow star magnitude 3. 9, 186 light-years from Earth.
Alpha Leporis, the brightest star of Lepus, is a white supergiant of magnitude 2. 6, 1300 light-years from Earth.
This is not a prominent constellation as all of its stars are third magnitude or fainter ; the brightest is Alpha Tucanae at apparent visual magnitude 2. 87.
Alpha Trianguli Australis, known as Atria, is a second magnitude orange giant and the brightest star in the constellation.
The three brightest stars, Alpha, Beta and Gamma, make up the triangle.
With a visual magnitude of 3. 5, Alpha Telescopii is the brightest star in the constellation.
Even though Johann Bayer gave Thuban the designation Alpha, its apparent magnitude of 3. 65 is 3. 7 times fainter than the brightest star in the constellation, Gamma Draconis ( Eltanin ), whose apparent magnitude is 2. 24.
Vega ( α Lyr, α Lyrae, Alpha Lyrae ) is the brightest star in the constellation Lyra, the fifth brightest star in the night sky and the second brightest star in the northern celestial hemisphere, after Arcturus.
Alpha Arietis ( α Ari, α Arietis ) is the Bayer designation for the brightest star in the northern zodiacal constellation of Aries.
Alpha and star
However, Alpha Centauri is a bright binary star, whose unresolved components to the naked eye are both fainter than Arcturus.
The game can be won by destroying all other civilizations, reaching the end of the modern era with the highest score, or by winning the space race by reaching the star system of Alpha Centauri.
Alpha Centauri is not actually a sequel to Civilization, despite beginning with the same event that ends Civilization and Civilization II: a manned spacecraft from Earth arrives in the Alpha Centauri star system.
Since the southern sky lacks an easily visible pole star, Alpha and Gamma ( known as Acrux and Gacrux respectively ) are commonly used to mark south.
Alpha Crucis, called Acrux, is a triple star 321 light-years from Earth.
Alpha Ceti, traditionally called Menkar, is a red-hued giant star of magnitude 2. 5, 220 light-years from Earth.
Alpha Centauri is a triple star system that contains Proxima Centauri, the nearest star to the Sun.
Alpha Chamaeleontis is a white-hued star of magnitude 4. 1, 63 light-years from Earth.
Alpha and constellation
The two stars of Alpha and Beta Centauri are often referred to as the " Southern Pointers " or just " The Pointers ", allowing people to easily find the asterism of the Southern Cross or the constellation of Crux.
The traditional name of Alpha Cygni means " tail " and refers to its position in the constellation.
These are given a Greek letter followed by the genitive case of the constellation in which they are located ; examples are Alpha Centauri or Gamma Cygni.
Thuban also known by its Bayer designation Alpha Draconis ( α Draconis, α Dra ) is a star ( or star system ) in the constellation of Draco.
* Amerigo Vespucci maps the two stars Alpha Centauri and Beta Centauri, as well as the stars of the constellation Crux, which are below the horizon in Europe.
Alpha Herculis ( α Her, α Herculis ) is a multiple star system in the constellation Hercules.
Fomalhaut ( Alpha Piscis Austrini, Alpha PsA, α Piscis Austrini, α PsA ) is the brightest star in the constellation Piscis Austrinus and one of the brightest stars in the sky.
Alpha Crucis ( α Cru, α Crucis, also Acrux, HD 108248 ) is the brightest star in the constellation Crux, the Southern Cross, and, at a combined visual magnitude 0. 77, is the twelfth brightest star in the night sky.
Achernar ( α Eri, α Eridani, Alpha Eridani ), sometimes spelled Achenar, is the brightest star in the constellation Eridanus and the ninth-brightest star in the night sky.
Beta Crucis, also known as Mimosa or Becrux, is the second brightest star in the constellation Crux ( after Alpha Crucis or Acrux ) and is the 19th brightest star in the night sky.
Regulus ( α Leo, α Leonis, Alpha Leonis ) is the brightest star in the constellation Leo and one of the brightest stars in the night sky, lying approximately 77. 5 light years from Earth.
Only two of the stars in this constellation are brighter than visual magnitude 5: Alpha ( α ) and Beta ( β ) reticuli.
Castor ( α Gem, α Geminorum, Alpha Geminorum ) is the second brightest star in the constellation Gemini and one of the brightest stars in the night sky.
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