I thought that was Asimov
Hmmm. . .
a ) I don’t think God was busy dealing in astrology; and
b ) the celestial event was apparently not visible to the inhabitants of Jerusalem, who became expectant and excited when told that the star had been seen; ergo, it doesn’t appear to have been something that everybody clearly saw.
Multivac ponders this question for Eternity and eventually all the stars have worn out and the Universe is just dregs of expended energy. Multivac had encorporated all of mankind into his higher order self and finally when the answer appeared he said,
"Let there be Light!" I read over 150 of Asimov's Books!