Description: O núcleo de um cometa é a parte central do cometa. Trata-se de um objeto sólido, semelhante a uma bola de neve suja, composto por gelo e partículas rochosas e empoeiradas. Longe do Sol, o núcleo é o único componente do cometa. Quando se aproxima do Sol, o núcleo do cometa é aquecido pela luz solar. Isso faz com que o gelo da superfície sublime. O gelo sublimado e a poeira incrustada nele são ejetados passam a envolver o núcleo como uma coma com uma cauda apontando para longe do Sol.

Related Terms:

• Coma cometária
• Cometa
• Cometary Tail

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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