Algol - définition. Qu'est-ce que Algol
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Qu'est-ce (qui) est Algol - définition

TRIPLE STAR SYSTEM IN THE CONSTELLATION PERSEUS
Beta Persei; Demon Star; Algol (astronomy); Algol A; HIP 14576; Algol (star); Β Persei; Β Per; 26 Persei; 26 Per; Algol B; Beta Per
  • CHARA interferometer]] in the near-infrared H-band, sorted according to orbital phase. Because some phases are poorly covered, Aa2 jumps at some points along its path.
  • Interpolation of the orbit of Aa2 around Aa1 with focus on Aa1.
  • Light curve of the Algol recorded by NASA's [[Transiting Exoplanet Survey Satellite]] (TESS).
  • 2}}-milliarcsecond resolution in the near-infrared H-band. The elongated appearance of Algol Aa2 (labelled B) and the round appearance of Algol Aa1 (labelled A) are real, but the form of Algol Ab (labelled C) is an artifact.
  • Algol is a bright star in the constellation of Perseus (upper right).

Algol         
  • Family tree of the Algol, [[Fortran]] and [[COBOL]] programming language dynasty
FAMILY OF IMPERATIVE COMPUTER PROGRAMMING LANGUAGES
Algol programming language; Algol language; ALGOL programming language; ALGOL (programming language); Algol (programming language); Algorithmic language; Computer language ALGOL; Algol-like; Algorithmic Language; Triplex-ALGOL Karlsruhe; Triplex-ALGOL; Triplex-ALGOL 60 Karlsruhe; Triplex-ALGOL 60; ALGOL family
['alg?l]
¦ noun an early, high-level computer programming language which was devised to carry out scientific calculations.
Origin
1950s: from algo(rithmic) + the initial letter of language.
ALGOL         
  • Family tree of the Algol, [[Fortran]] and [[COBOL]] programming language dynasty
FAMILY OF IMPERATIVE COMPUTER PROGRAMMING LANGUAGES
Algol programming language; Algol language; ALGOL programming language; ALGOL (programming language); Algol (programming language); Algorithmic language; Computer language ALGOL; Algol-like; Algorithmic Language; Triplex-ALGOL Karlsruhe; Triplex-ALGOL; Triplex-ALGOL 60 Karlsruhe; Triplex-ALGOL 60; ALGOL family
Algol         
  • Family tree of the Algol, [[Fortran]] and [[COBOL]] programming language dynasty
FAMILY OF IMPERATIVE COMPUTER PROGRAMMING LANGUAGES
Algol programming language; Algol language; ALGOL programming language; ALGOL (programming language); Algol (programming language); Algorithmic language; Computer language ALGOL; Algol-like; Algorithmic Language; Triplex-ALGOL Karlsruhe; Triplex-ALGOL; Triplex-ALGOL 60 Karlsruhe; Triplex-ALGOL 60; ALGOL family
·noun A fixed star, in Medusa's head, in the constellation Perseus, remarkable for its periodic variation in brightness.

Wikipédia

Algol

Algol , 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, but cooler and fainter, β Persei Aa2 regularly pass in front of each other, causing eclipses. Thus Algol's magnitude is usually near-constant at 2.1, but regularly dips to 3.4 every 2.86 days during the roughly 10-hour-long partial eclipses. The secondary eclipse when the brighter primary star occults the fainter secondary is very shallow and can only be detected photoelectrically.

Algol gives its name to its class of eclipsing variable, known as Algol variables.