what is algol used for
what is algol used for
, Coordinates: 03h 08m 10.1315s, +40° 57′ 20.332″, This article is about the star. Describe 2020 In Just One Word? Additionally, ALGOL was used as the standard method for creating algorithms by the ACM in textbooks and academia for over 30 years.. Major ALGOL specifications Copyright © 2020 Multiply Media, LLC. All Rights Reserved. the second brightest star in Perseus, the first known eclipsing binary. , The association of Algol with a demon-like creature (Gorgon in the Greek tradition, ghoul in the Arabic tradition) suggests that its variability was known long before the 17th century, but there is still no indisputable evidence for this. Algol is bright, varying from 2nd magnitude to 3rd magnitude.  Hipparchus and Pliny made this a separate, though connected, constellation. Therefore, when the dimmer of the two stars swings in front of the brighter star, we see Algol at minimum brightness. Now it’s here. Bruce McClure has served as lead writer for EarthSky's popular Tonight pages since 2004. Draw an imaginary line from the star Gamma Cassiopeia through the star Ruchbah to locate Perseus and then Algol. , Historically, the star has received a strong association with bloody violence across a wide variety of cultures. ALGOL 68 uses modes instead of “type” to detonate the data type. The first European astronomer to note the light variation was the Italian Geminiano Montanari in 1670; the English astronomer John Goodricke measured the cycle (69 hours) in 1782 and suggested partial eclipses of the star by another body as a cause, a hypothesis proved correct in 1889. Magnetic activity cycles in the chromospherically active secondary component induce changes in its radius of gyration that have been linked to recurrent orbital period variations on the order of ΔP/P ≈ 10−5 via the Applegate mechanism. To cook in water, just below boiling temperature. Algol can mean one of the stars in the constellation Beta Persei. The question is not whether "algol-style," i.e. For example, there is Boolean , character, real, and integer. , In Chinese, 大陵 (Dà Líng), meaning Mausoleum, refers to an asterism consisting of β Persei, 9 Persei, τ Persei, ι Persei, κ Persei, ρ Persei, 16 Persei and 12 Persei. From Earth, we see the orbital plane of this binary star almost exactly edge-on.  Astrologically,[clarification needed] Algol is considered one of the unluckiest stars in the sky, and was listed as one of the 15 Behenian stars. It will be seen that this star combines the Algol and Beta Lyr types. It’s an eclipsing binary star. What is the popular or general journal called in English? The comparatively long duration of the eclipse shows that the dimensions of the two stars are not negligible in comparison with the distance between them. Omissions? The paradox can be solved by mass transfer: when the more massive star became a subgiant, it filled its Roche lobe, and most of the mass was transferred to the other star, which is still in the main sequence. Corrections? This version, described in the now-famous ALGOL 60 Report, had a profound impact on the the field of programming language design. Their work was released as the language now known as ALGOL 58. , The variability of Algol was noted in 1667 by Italian astronomer Geminiano Montanari, but the periodic nature of its variations in brightness was not recognized until more than a century later, when the British amateur astronomer John Goodricke also proposed a mechanism for the star's variability. It's about Algol, the actual language, and what may have caused it to be phased out of use in the industry while other "ancient" languages like Lisp and Fortran are still used. Algol definition, a star of the second magnitude in the constellation Perseus: the first known and most famous eclipsing binary star. Algol definition is - a binary star in the constellation Perseus whose larger member orbits and eclipses the smaller, brighter star causing periodic variation in brightness. Algol is a Finnish family-owned business and a multi-branch company. See more. 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. Algol is a known variable star, which waxes and wanes in brightness. In some binaries similar to Algol, a gas flow can be seen. structured, imperative programming, is still in use. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition If you were one of the early stargazers, you might have chosen Algol in the constellation Perseus. How old was queen elizabeth 2 when she became queen? Early astronomers nicknamed Algol the Demon Star. 1", AEEA (Activities of Exhibition and Education in Astronomy), https://en.wikipedia.org/w/index.php?title=Algol&oldid=988755023, Astronomical objects known since antiquity, Articles with Chinese-language sources (zh), Short description is different from Wikidata, Articles containing Chinese-language text, Articles which use infobox templates with no data rows, Wikipedia articles needing clarification from July 2011, Creative Commons Attribution-ShareAlike License, This page was last edited on 15 November 2020, at 01:50.
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