supergranulation

supergranulation
A large-scale system of convection cells covering the surface of the sun

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  • Supergranulation — is a particular pattern on the Sun surface. It was discovered in the 1950s by A.B.Hart on Doppler velocity measurements showing horizontal flows on the photosphere (flow speed about 300 to 500 m/s). Later works (1960 s) by Leighton, Noyes and… …   Wikipedia

  • supergranulation — [sypɛʀgʀanylɑsjɔ̃] n. f. ÉTYM. Av. 1973 (in Encycl. Univ., art. Soleil); de super (2.), et granulation. ❖ ♦ Astron. Phénomène qui détermine au niveau de la photosphère solaire des formations (cellules …   Encyclopédie Universelle

  • supergranulation cell — /sooh peuhr gran yeuh lay sheuhn/, Astron. one of a number of large convection cells in the photosphere and chromosphere of the sun, each having a diameter of 10,000 20,000 mi. (16,000 32,000 km) and lasting longer than a day. Also called… …   Universalium

  • supergranulation cell — /sooh peuhr gran yeuh lay sheuhn/, Astron. one of a number of large convection cells in the photosphere and chromosphere of the sun, each having a diameter of 10,000 20,000 mi. (16,000 32,000 km) and lasting longer than a day. Also called… …   Useful english dictionary

  • supergranulation — …   Useful english dictionary

  • supergranulation cell — noun A large region of convection in the photosphere of the sun; a supergranule …   Wiktionary

  • SOLEIL — Le Soleil est l’une des innombrables étoiles de notre Galaxie; à cet égard, ni sa position ni ses propriétés intrinsèques ne sont exceptionnelles. Situé aux deux tiers du rayon galactique (à 8,5 kpc du centre galactique), il appartient à un bras… …   Encyclopédie Universelle

  • sun — sunlike, adj. /sun/, n., v., sunned, sunning. n. 1. (often cap.) the star that is the central body of the solar system, around which the planets revolve and from which they receive light and heat: its mean distance from the earth is about 93… …   Universalium

  • Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun …   Wikipedia

  • Corona — This article is about the astronomical term. For other uses, see Corona (disambiguation). During a total solar eclipse, the solar corona can be seen with the naked eye. A corona is a type of plasma atmosphere of the Sun or other celestial body,… …   Wikipedia

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