Of all the billions of stars out there，is there none around which intelligent life has arisen.
后半句没了解的意思是，结构也不太懂，请老师剖析解答，谢谢!
Of all the billions of stars out there，is there none around which intelligent life has arisen.
参考译文：在那数十亿颗恒星之中，没一颗出现过智慧生命。
后半句为，介词around+关系代词which引导定语从句，which指代前面名词stars.