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inclined to the ecliptic.” This theory ex-
plained all the phases of the ring which had
puzzled others. This ring was then, and
has remained ever since, a unique structure.
We in this age have got accustomed to it.
But Huyghens’s discovery was received with
amazement.
In 1675 Cassini found the ring to be dou-
ble, the concentric rings being separated by
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