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    Algol - Wikipedia

    • Algol /ˈælɡɒl/, designated Beta Persei (β Persei, abbreviated Beta Per, β Per), known colloquially as the Demon Star, is a bright multiple star in the constellation of Perseus and one of the first non-nova variable stars to be discovered. Algol is a three-star system, consisting of Beta Persei Aa1, Aa2, and Ab – in which the hot luminous primary β Persei Aa1 and the larger… See more

    Observation history

    An ancient Egyptian calendar of lucky and unlucky days composed some 3,200 years ago is said to be the oldest … See more

    System

    Algol is a multiple-star system with three confirmed and two suspected stellar components. From the point of view of the Earth, Algol Aa1 and Algol Aa2 form an eclipsing binary because their orbital plane contains the … See more

    ConstellationPerseus
    Right ascension03ʰ 08ᵐ 10.13245ˢ
    Declination+40° 57′ 20.3280″
    Apparent magnitude (V)2.12 (- 3.39)
    What is ALGOL object code?
    ALGOL object code was a simple, compact stack-based instruction set architecture commonly used in teaching compiler construction and other high order languages. ALGOL was developed jointly by a committee of European and American computer scientists in a meeting in 1958 at the Swiss Federal Institute of Technology in Zurich (cf. ALGOL 58).
    codedocs.org
    Names

    Beta Persei is the star's Bayer designation.
    The name Algol derives from Arabic رأس الغول raʾs al-ghūl : head (raʾs) of the ogre (al-ghūl) (see "ghoul"). The English name Demon Star was taken from the Arabic name. In 2… See more

    Observing Algol

    The Algol system usually has an apparent magnitude of 2.1, similar to those of Mirfak (α Persei) at 1.9 and Almach (γ Andromedae) at 2.2, with whom it forms a right triangle. During eclipses it dims to 3.4, making it as faint as nea… See more

    Cultural significance

    Historically, the star has received a strong association with bloody violence across a wide variety of cultures. In the Tetrabiblos, the 2nd-century astrological text of the Alexandrian astronomer Ptolemy, Algol is referred to … See more

    See also

    • Jaana Toivari-Viitala, egyptologist who contributed to understanding Ancient Egypt and the star See more

    External links

    • "Algol 3". SolStation. Retrieved 31 July 2006.
    • "4C02517". ARICNS. 4 March 1998. Archived from the original on 10 February 2006. Retrieved 31 July 2006.
    • "Algol". Alcyone ephemeris. Retrieved 8 June 2006.… See more

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    Table of Contents
    Observation history
    System
    Quick Facts
    What is ALGOL object code?
    Names
    Observing Algol
    Cultural significance
     
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