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新发现天体可能重新定义太阳系边缘
source link: https://tech.sina.com.cn/d/s/2018-10-03/doc-ifxeuwws0590667.shtml
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新华社华盛顿10月2日电（记者周舟）美国天文学家新发现了太阳系中一颗轨道远超冥王星的遥远天体，这一发现可能重新定义太阳系的边缘。国际天文学联合会小行星中心2日公布了直径接近300千米的天体“2015TG387”，其轨道表明更遥远的地方可能有
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