The bulk of the mass is spread out, forcing stars to trace a Spirograph-like rosette: an ellipse that does not close on itself but gets offset each time the star completes one revolution[ see box at right].

  • 整体质量分散开来,迫使恒星运行方式如旋转绘图盘所画出的花瓣状螺线:那不是每圈都会封闭起来的椭圆,恒星绕行一周后,轨道并不接合便又重新开始下一周的运动(右方〈理轨道秩序〉。
目录 查词历史