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揭秘宇宙深处的“小红点”
“小红点”天体的发现对传统的星系和黑洞形成理论提出了严峻挑战。按照现有理论,星系的形成始于宇宙早期的物质密度涨落,这些涨落孕育了暗物质晕,随后气体逐渐汇聚到暗物质晕中,形成高密度区域,进而催生恒星与黑洞。在这一框架下,超大质量黑洞的成长被认为是一个相 ...
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Interim pres steps down
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Israel strikes Beirut
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