I think the wording of the text draws our minds to ponder the beauty and arrangement of the stars and the power of God who put them in their place. Back in the days before electricity, the heavens would have been the most fascinating movie theatre to watch and it is no surprise that ancient philosophers identified the idea of God/gods with them and paid special attention to those starts that did not move normally in the sky. These known as planets today move differently because they orbit the Sun.
To the question, I think that God did created the many types of constellations that mark the seasons around the equator as one of the many marvelous works of his hands that man cannot but ponder. Even the deepest Ocean has marvelous fish that is full of mystery and marvel, and these have gone thousand of years without notice until some water robot takes pictures of them. How much more these bright stars that man looked at each night?
In Job it seems the importance of the constellations within the idolatrous minds of pagans is assumed, which makes the argument more persuasive because they are all God's creation indicating power over all supposed gods. The wise men following the star to Bethlehem is of a similar indication that God speaks his divine word according to the mindsets of the hearers. The term Death and Hades (Greek god of the underworld) in the Bible also seems to accommodate meaning form Pagan symbolism. (Rev 1:18) Just because a word is principally used in pagan culture or profane religion does not mean that it does not convey something the Spirit chooses to communicate heavenly truths with. This seems to be such a case.