"CVXI." what is the meaning of the extended metaphor in this sonnet

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Explanation:

The poet begins by stating he should not stand in the way of "the marriage of true minds", and that love cannot be true if it changes for any reason; true love should be constant, through any difficulties. In the seventh line, the poet makes a nautical reference, alluding to love being much like the north star is to sailors. Love also should not fade with time; instead, true love is, as is the polar star, "ever-fixed" and lasts forever.

where is the sentence at?

the apollo program, also known as project apollo, was the third united states human spaceflight program carried out by the national aeronautics and space administration (nasa), which succeeded in landing the first humans on the moon from 1969 to 1972.