planetary collision theory
行星碰撞理论
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Work on Uranian rings and some general problems of the planetary rings including the collision process in the rings, the photometric theory and their origin are also elucidated.
F环。还评述了天王星环以及行星环中的碰撞、光度理论和起源等问题的研究。
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