When Jesus fed the multitude by creating bread and fish from one boy's lunch, he didn't create enough to bury the whole crowd waist deep in food and then say "Behold the power of God!". He only created enough to fit the need for the day to give the people enough energy to make it back to their homes. He also commanded the leftovers to be gathered which says to me that God is not wasteful and is very purposeful in what he does.
So to say that 50 billion gallaxies times 400 billion stars (I assume most gallaxies will be similiar in construction if the mechanics for their creation parellel) per galaxy would be a waste of energy for a God who bothered to collect some shreds of bread and fish heads (I would not have eaten the heads if I had been there).
From an evolutionist perspective it seems logical to me that there are as many stars as there is, in fact it would not be troubling to me if there turns out to be even more. But from a creationist perspective the volume of stars is perplexing if made by the same God as Jesus claimed to be. So not only do the other stars in general have a purpose, but based on the collection of the food scraps example, each and every star and surrounding planet out there must have a specific purpose if it holds to God's own example given of himself.
If this issue would ever be rectified within the bounds of the Creationist model, an MP3 sermon CD of it would probably outsell Michael Jackson's Thriller album. (We have to talk about MJ since he's in the news today)