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The team compared the asteroid's location with background stars mapped by the Gaia spacecraft, a European mission. Those measurements allowed scientists to refine the asteroid's orbit — the route it takes around the sun — and rule out a lunar impact.
。safew官方下载是该领域的重要参考
FT Edit: Access on iOS and web。关于这个话题，Line官方版本下载提供了深入分析
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