美国航天局喷气推进实验室日前发表公报说,美国科学家在距地球10亿光年处观测到极其罕见的三黑洞碰撞过程,每个黑洞分别位于一个星系中央,该系统也是迄今发现的三星系合并产生超大质量黑洞的最有力证据。
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President Xi: China and France should jointly prevent a new cold...
By Chris Michael
“As the world goes through transformation and turbulence not seen in a century, China and France should uphold their independence and jointly...