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تحقیق دونی - کهکشان‌های بیضوی
جمعه 29 آبان 1388

کهکشان‌های بیضوی

• نوشته شده توسط: عاک میک

 

کهکشان‌های بیضوی کهکشان‌هایی هستند که شکلی بیضی‌گون دارند و بازوهای مارپیچی در آن‌ها دیده نمی‌شود.

بیشترین نوع کهکشانی که وجود دارد، کهکشان بیضوی است. برخی از کهکشان‌های بیضوی به شدت کشیده و پهن هستند. برای مشخص شدن میزان کشیدگی، هابل این گونه از کهکشان‌ها را به ۸ زیر گروه تقسیم کرد. که این زیر گروه‌ها با علامت‌های E0,E1,E2,E3,E4,E5,E6,E7 نشان داد.

۶۰ درصد کل کهکشان‌ها و کوچک‌ترین و بزرگ‌ترین کهکشان‌های کیهان بیضوی هستند. عموماًاز ستارگان پیر تشکیل شده دارای توده‌های گازی برای تولید ستاره‌های جدید نیستند. بیشتر آن‌ها دارای سه محور می‌باشند و اندازه هر یک از محورها نیز متفاوت است.

 

پرش به: ناوبری, جستجو
کهکشان عظیم بیضوی ESO 325-G004.

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