aurora

A diffused glow, bright patches, streamers, arches, or dancing color patterns that are frequently seen at high geographic latitudes mostly above 60°north or south latitude. The aurora seen in the Northern Hemisphere is referred to as aurora borealis, or the northern lights, and that in the Southern Hemisphere is known as aurora australis, or the southern lights. The phenomenon is associated with sunspot activity. The auroras are important in radio communications, because they affect the propagation of electromagnetic waves in high-frequency and very high frequency ranges. Signals may be returned to earth at much higher frequencies than usual when the aurora are active. The unusual solar activity that causes aurora, however, also can degrade normal ionospheric propagation. Sometimes, the disturbance is so pronounced that even wire circuits are disrupted by fluctuating magnetic fields.

Aviation dictionary. 2014.

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  • Aurora — most commonly refers to: *Aurora (astronomy), a glow in the sky seen at polar latitudes, commonly referred to as the northern lights or the southern lights *Aurora (mythology), the goddess of the dawn in Roman mythologyAurora may also… …   Wikipedia

  • Aurora — (lat. ‚Morgenröte‘) steht für: Aurora (Mythologie), die römische Göttin der Morgenröte Morgenröte (Synonym), die rötliche Färbung des Osthimmels vor dem Sonnenaufgang Polarlicht, Aurora borealis (Nordlicht) und Aurora australis (Südlicht)… …   Deutsch Wikipedia

  • Aurora — Aurora, NE U.S. city in Nebraska Population (2000): 4225 Housing Units (2000): 1798 Land area (2000): 1.883621 sq. miles (4.878555 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.883621 sq. miles (4.878555 sq …   StarDict's U.S. Gazetteer Places

  • auroră — AURÓRĂ, aurore, s.f. 1. Interval de timp, înainte de răsăritul soarelui, când există o lumină difuză în atmosferă; lumină roşie portocalie a soarelui din acest interval de timp. ♢ Auroră boreală (sau polară, australă) = lumină difuză, verde sau… …   Dicționar Român

  • aurora — sustantivo femenino 1. Claridad que precede a la salida del Sol: Con la aurora se pusieron en camino. Sinónimo: amanecer. 2. Uso/registro: literario. Comienzo de alguna cosa: la aurora de la humanidad, la aurora de la vida. Si …   Diccionario Salamanca de la Lengua Española

  • Aurora 1 — Saltar a navegación, búsqueda Aurora 1 Organización Departamento de Defensa de los Estados Unidos Estado Inactivo Satélite de Tierra Fecha de lanzamiento …   Wikipedia Español

  • aurora — (Del lat. aurōra, de aura, brillo, resplandor). 1. f. Luz sonrosada que precede inmediatamente a la salida del Sol. 2. Principio o primeros tiempos de algo. 3. Hermosura del rostro, y, por ext., el rostro sonrosado. 4. Bebida compuesta de leche… …   Diccionario de la lengua española

  • Aurora — Au*ro ra, n.; pl. E. {Auroras}, L. (rarely used) {Auror[ae]}. [L. aurora, for ausosa, akin to Gr. ?, ?, dawn, Skr. ushas, and E. east.] 1. The rising light of the morning; the dawn of day; the redness of the sky just before the sun rises. [1913… …   The Collaborative International Dictionary of English

  • Aurora FC — Voller Name Aurora FC Gegründet 14. April 1945 Stadion Estadio Del Ejército Plätze …   Deutsch Wikipedia

  • aurora — aurȏra (auróra) ž DEFINICIJA 1. a. knjiš. ekspr. prva jutarnja svjetlost pri pojavi dana; zora, osvit b. meteor. svjetlosna pojava u polarnim i višim geografskim širinama na S i J dijelu horizonta [aurora borealis; aurora australis] 2. (Aurora) a …   Hrvatski jezični portal

  • Aurora — Aurora1 [ô rôr′ə, ərôr′ə] n. pl. for 2 4 auroras, aurorae [ô rôr′ē, ə rôr′ē] [L, lit., dawn: for IE base see EAST] 1. Rom. Myth. the goddess of dawn: identified with the Greek Eos 2. [a ] the dawn 3. [a ] AURORA AUSTRALIS or AURORA BOREALIS …   English World dictionary

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