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Alpha Centauri A is a star of the star system Alpha Centauri. It is approximately 4.36 light-years from Earth. It is also the brightest of the three stars in the star system. The Pleiades star cluster A star is a massive body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. ...
The position of Alpha Centauri Alpha Centauri (α Cen / α Centauri) is the brightest star system (a triple star system) in the southern constellation of Centaurus, and contains the fourth brightest star in the sky, with a total visual magnitude of −0. ...
A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ...
Jump to: navigation, search Earth, also known as the Earth, Terra, and (mostly in the 19th century) Tellus, is the third-closest planet to the Sun. ...
Brightness is an attribute of visual perception in which a source appears to emit a given amount of light. ...
Alpha Centauri A is also known as Rigil Kentaurus, Toliman, HD 128620, HR 5459, CP -60°5483, GCTP 3309.00A, and LHS 50. 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. ...
In astronomy, many stars are referred to simply by catalogue numbers. ...
In astronomy, many stars are referred to simply by catalogue numbers. ...
Some facts about Alpha Centauri A Parallax (Greek: παÏαλλαγή (parallagé) = alteration) is the change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of said observer. ...
In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequenly refined in terms of other characteristics. ...
Radial velocity is the velocity of an object in the direction of the line of sight. ...
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...
The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ...
In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standardized distance away. ...
Jump to: navigation, search // In General Physics In general physics, luminosity (more properly called luminance) is the density of luminous intensity in a given direction. ...
For the geometric term, see diameter. ...
The angular diameter of an object as seen from a given position is the diameter measured as an angle. ...
See also The position of Alpha Centauri Alpha Centauri (α Cen / α Centauri) is the brightest star system (a triple star system) in the southern constellation of Centaurus, and contains the fourth brightest star in the sky, with a total visual magnitude of −0. ...
Alpha Centauri B (also Rigel Kentaurus B — the foot of the centaur in Arabic) is a star of the Alpha Centauri star system. ...
Jump to: navigation, search The red dwarf star Proxima Centauri, part of the Alpha Centauri star system, is the nearest star to the Sun. ...
This list of the nearest stars to Earth is ordered by increasing distance out to a maximum of 5 parsecs (16. ...
References Jump to: navigation, search March 21 is the 80th day of the year in the Gregorian Calendar (81st in leap years). ...
Jump to: navigation, search 2003(MMIII) is a common year starting on Wednesday of the Gregorian calendar. ...
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