It's a much more elaborate simile than that: "the broad circumference / hung on his shoulders like the Moon whose Orb / through Optic Glass the Tuscan Artist views.

这是一个更为精细的比喻：,“那个阔大的圆形物/好像一轮挂在他双肩的明月“,/就是那个托斯卡纳的大师“

耶鲁公开课 - 弥尔顿课程节选