天文學家發現了一種全新天體！| 天文新鮮事 | Linvo說宇宙
Synopsis
天文學家發現了一種全新天體：它不是星系，但有著星系一樣的暗物質暈，它內部沒有恆星，有的只是上百萬倍太陽質量的中性氫 ...
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