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GALAXIE SPIRALE [1 record]

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Record 1 2011-07-21

English

Subject field(s)
  • Astronomy
DEF

A galactic disk with a dense center and a spiral structure of gas and dust.

OBS

Three groups of spirals are identified Sa, Sb and Sc.

French

Domaine(s)
  • Astronomie
OBS

Les galaxies sont réparties, suivant leur aspect, en trois grandes catégories: elliptiques, spirales et irrégulières. [...] Les spirales proprement dites, lorsqu'elles sont vues de profil, sont toujours plus aplaties que les nébuleuses elliptiques. Vues de face, leur structure spiralée montre une nette symétrie de révolution.

Spanish

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