Accordingly, since nothing prevents the earth from moving, I suggest that we should now consider also whether several motions suit it, so that it can be regarded as one of the planets. For, it is not the center of all the revolutions.

-- Nicolaus Copernicus 哥白尼

因此，既然没有什么能阻止地球运动，我建议我们现在也应该考虑几个运动是否适合它，这样它就可以被看作是行星之一。因为，它不是所有革命的中心。

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Planets Motions

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For it is the duty of an astronomer to compose the history of the celestial motions through careful and expert study.

因为天文学家有责任通过仔细而专业的研究来撰写天体运动的历史。

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The sun and its retinue of planets drift as a group through the vast gulfs of space that separate the stars.

太阳和它的随从行星作为一个整体在分隔恒星的巨大空间中漂移。

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If the greatest god is the stillness all the motions add up to, then we must ineluctably be included.

如果最伟大的上帝是所有运动加起来的静止，那么我们就不可避免地要包括在内。

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