The Child in the Stars

When they saw the star, they rejoiced with exceeding great joy. Mt. 2:10

What was it about this star that brought about such a response? Was it particularly bright? Was it somehow a pointer to the place? The context tells us that the star was in the east. And whether through their study of the stars or revelation this was the star that indicated where the Child was to be born. So many questions arise. Why at this point, when it was only the star was there this inner depth of joy? Yes, they knew this to be a special child, a royal prince that was unique among princes. But to provoke exceeding great joy? Then one must imagine an exponential rise in joy when they actually beheld the Child. What could be the only response but worship!