facula

facula
—facular, adj.
/fak"yeuh leuh/, n., pl. faculae /-lee'/. Astron.
an irregular, unusually bright patch on the sun's surface.
[1700-10; < L: little torch, equiv. to fac- (s. of fax) torch + -ula -ULE]

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      in astronomy, bright granular structure on the Sun's surface that is slightly hotter or cooler than the surrounding photosphere. A sunspot always has an associated facula, though faculae may exist apart from such spots. Faculae are visible in ordinary white light near the Sun's limb (apparent edge), where the photospheric background is dimmer than near the centre of the disk. The extensions of faculae up into the chromosphere become visible over the entire disk in spectroheliograms taken at the wavelengths of hydrogen or ionized calcium vapour. When seen thus away from the limb, they are called chromospheric faculae or plages.

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Look at other dictionaries:

  • faculă — FÁCULĂ, facule, s.f. Parte mai strălucitoare de pe discul solar. – Din fr. facule. Trimis de LauraGellner, 05.05.2004. Sursa: DEX 98  fáculă s. f., g. d. art. fáculei; pl. fácule Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic  FÁCULĂ …   Dicționar Român

  • fácula — (Del lat. facŭla, antorcha pequeña). f. Astr. Cada una de las partes más brillantes que se observan en el disco del Sol …   Diccionario de la lengua española

  • façula — s. f. [Informal] Faceira.   ‣ Etimologia: face + ula …   Dicionário da Língua Portuguesa

  • fácula — s. f. Mancha luminosa que se vê às vezes no disco do Sol ou da Lua …   Dicionário da Língua Portuguesa

  • fácula — sustantivo femenino 1. Área: astronomía Cada una de las áreas más brillantes que se aprecian en el disco del Sol …   Diccionario Salamanca de la Lengua Española

  • Fácula — (Derivado de hacha < lat. facula, antorcha.) ► sustantivo femenino ASTRONOMÍA Parte brillante de la superficie del Sol, asociada con manchas solares. * * * fácula (del lat. «facŭla», antorcha pequeña) f. Astron. Se aplica a ciertas partes más… …   Enciclopedia Universal

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  • Facula — For the genus of gossamer winged butterflies, see Facula (butterfly)..Solar faculae are bright spots that form in the canyons between solar granules, short lived convection cells several thousand kilometers across that constantly form and… …   Wikipedia

  • Facula (butterfly) — Taxobox name = Facula regnum = Animalia phylum = Arthropoda classis = Insecta ordo = Lepidoptera familia = Lycaenidae genus = Facula Facula is a genus of butterfly in the family Lycaenidae …   Wikipedia

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