How did the ring of new stars form in this galaxy?
由新恒星构成的指环是怎么形成的？
Normal matter in galaxy clusters is mostly in the form of hot gas and stars.
星系群中的常态物质大概是由热气团和星团所组成的。
Normal matter and galaxy cluster is mostly in the form of hot gas and stars.
正常物质和银河系主要在热气体和星星形式中。
Normal matter and galaxy cluster is mostly in the form of hot gas and stars.
正常物质和银河系主要在热气体和星星形式中。
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