这意味着它只需要做很小的速度调整就可以实现对这几颗行星的近距离飞掠，放个探测器或者利用行星的引力都很方便。其中一种可能就是它会停留在木星轨道，这在当前的太阳帆技术下就可以实现。这么大号的一个UFO整天在家门口转悠，多可怕，不怕贼偷就怕贼惦记啊～ ...

周一 · 知古通今 | 周二 · 牧夫专栏 周三 · 太空探索 | 周四 · 观测指南 周五 · 深空探测 | 周六 · 茶余星话 | 周日 · 视频天象作者：Sara ...

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