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FLOCCULI [1 record]

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Record 1 1996-09-19

English

Subject field(s)
  • Astronomy
DEF

a bright or dark patch on the sun seen in the light of calcium or hydrogen usually in the vicinity of sunspots or other active regions.

Key term(s)
  • flocculus
  • solar flocculus

French

Domaine(s)
  • Astronomie
DEF

[...] grains de 100 à 200 km de diamètre, dont paraît se composer la surface de la chromosphère solaire observée dans la raie K du calcium, sur tout le fond où se détachent protubérances et plages faculaires.

DEF

Nuages sombres ou brillants qui forment une plage faculaire au-dessus d'une tache solaire.

OBS

Le concept de plage faculaire remplace désormais celui de flocculi. En anglais, cependant, on l'utilise encore. La forme au singulier flocculus est rarement employée autant en anglais qu'en français.

OBS

L'expression française flocules solaires est bien attestée dans un dictionnaire spécialisé mais elle est rarement utilisée.

Spanish

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