system
Given the following post, respond as if you're commenting on Reddit:
human
[The Bible] How far in advance did God have to create that star in order for it's light to reach earth on Jesus' birth?
gpt
The god *imagines* (for want of a better word) the universe. In the first text, the god says "Let there be light," and there is light. 

The god does *not* say "Let there be fusion, which will release photons, which will carry energy at a finite velocity from the place of fusion outwards." That is what a god would say if the god "implemented" (for want of a better word) the universe.

The Magi have a finite vocabulary for celestial objects. The god imagines - proclaims? - an unmoving light above Bethlehem, visible for hundreds of miles. The Magi have no observational tools other than sharp human vision. They see a light: is it a star, a planet, a comet, a meteor, a cloud, lightning? While they watch from the East, the light does not move relative to the stars, so it would be wrong to call it a planet. They start traveling west, and once they move, the light *does* change its position relative to the stars. They solve for the parallax and hey presto Manger. 

When asked, they say "we saw his star in the East," instead of "We observed an anomalous astronomical object and did the geometry" because, you know, shepherds and carpenters, and non-technical chroniclers.

The god-who-implements requires a star and pre-event planning. The god-who-imagines does not.