This question already has an answer here:
Would Adam and Eve have been able to see a starry sky during the night? The nearest star is four light-years away, meaning it takes four years for light to reach Earth. Thus, the night sky must have been completely black, (except for the moon), the first four years (give or take seven days) after the creation.
Or did God also create star-light that was already "on its way" towards Earth, and if so, what would be the reason for this?
We can observe the Andromeda galaxy today, and the light from the stars takes over a million years to reach Earth. Thus, if Earth is significantly younger than that, it would mean that the light that we see now, must have been created "separately".
For me, this sounds like a big mystery.