Description: Un disco è un sistema appiattito di materia in moto circolare complanare attorno ad un centro comune. Il materiale di un disco può essere costituito da molti elementi diversi, come gas, polvere o persino stelle. Ne sono un esempio i dischi di accrescimento attorno alle protostelle, i dischi protoplanetari intorno a giovani oggetti stellari, i dischi di accrescimento attorno ai nuclei galattici attivi, e i dischi galattici.

Related Terms:

• Nucleo galattico attivo
• Disco galattico
• Formazione dei pianeti
• Protostella
• disco di accrescimento

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 have been approved by a research astronomer and a teacher

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".