In the third (1971) printing of the Urantia Foundation's edition, the semicolon following "them" was replaced by a comma. The semicolon is the correct choice for joining two independent clauses.

Original Paragraph:

^{P520:4, 46:1.8} Jerusem receives faint light from several near-by suns -- a sort of brilliant starlight -- but it is not dependent on them; worlds like Jerusem are not subject to the vicissitudes of sun disturbances, neither are they confronted with the problem of a cooling or dying sun.