Your reply in post# 16..."As planets "move" before the "fixed" stars?"
I would appear that this movement of the star is different from normal planetary movements, more like an extra-natural, or supernatural event.
"...there came wise men from the east to Jerusalem" Mat. 2:1
"Saying, Where is he that is born King of the Jews? for we have seen his star in the east, and are come to worship him" Mat. 2:2
So the star was seen in the East, and they traveled to teh West to see the Child. Their first stop is in Jerusalem.
"When they had heard the king, they departed; and, lo, the star, which they saw in the east, went before them, till it came and stood over where the young child was. When they saw the star, they rejoiced with exceeding great joy. " Mat. 2:9,10
Now the star seems to have moved, until it stopped over the location of the Child. This star, and its susequent reappearance caused great joy to these men. The term "before them" connotates "in front of", or also, "in the lead of". It is interesting to note that Bethlehem is South of Jerusalem. So something about the star's movement had to make them turn South after having traveled East to Jerusalem, where they first met with Herod. From the Greek phrases "went before" and "and stood", we can see that the star was in motion in front of them and then came to a place where it stopped moving and remained still.
I'm not aware of stars, or planets, having such interesting movement. I hope that this reply addresses your question.
Merry Christmas!