Description: Molte galassie a spirale presentano una struttura a barra nella loro regione centrale, in cui la maggior parte delle stelle, del gas e della polvere si estendono seguendo un andamento rettilineo. I bracci a spirale della galassia iniziano ai bordi esterni di questa barra. Le galassie a spirale con una barra sono chiamate galassie a spirale barrata. Si ritiene che la Via Lattea sia una galassia a spirale barrata.

Related Terms:

• Via Lattea
• Galassia a spirale

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

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