I looked up Stellarium and “the great sign”. I really don’t see why the great sign would refer to constellations and assign sex and kingship to planets based on pagan stories about Greek gods.
Take a look at “The Witness of the Stars” by E. W. Bullinger that was published in 1893. He explains how the Gospel is written in the stars.
http://philologos.org/__eb-tws/
Such are the contents of this wondrous book that is written in the heavens. Thus has God been speaking and emphasizing and developing His first great prophetic promise of Genesis 3:15.
Though for more than 2,500 years His people had not this Revelation written in a book as we now have it in the Bible, they were not left in ignorance and darkness as to God’s purposes and counsels; nor were they without hope as to ultimate deliverance from all evil and from the Evil One.
Adam, who first heard that wondrous promise, repeated it, and gave it to his posterity as a most precious heritage— ground of all their faith, the substance of all their hope, the object of all their desire. Seth and Enoch took it up. Enoch, we know, prophesied of the Lord’s coming, saying, “Behold the Lord cometh with ten thousands of His saints to execute judgment upon all” (Jude 14). How could these “holy prophets, since the world began,” have recorded their prophecies better, or more effectually, or more truthfully and powerfully, than in these star-pictures and their interpretation? This becomes a certainty when we remember the words of the Holy Spirit by Zacharias (Luke 1:67-70):
“Blessed be the Lord God of Israel;
For He hath visited and redeemed His people,
And hath raised up a horn of salvation for us
In the house of His servant David;
As He spake by the mouth of HIS HOLY PROPHETS
WHICH HAVE BEEN SINCE THE WORLD BEGAN.”
The same truth is revealed through Peter, in Acts 3:20, 21: “He shall send Jesus Christ, which before was preached unto you; whom the heaven must receive until the times of restitution of all things, which God hath spoken by the mouth of all HIS HOLY PROPHETS SINCE THE WORLD BEGAN.”
These words have new meaning for us, if we see the things which were spoken “since the world began,” thus written in the heavens, which utter speech (i.e. prophecy), and show forth this knowledge day after day and night after night, the heritage of all the earth, and their words reaching unto the ends of the world.
This Revelation, coinciding as it does in all its facts and truths with that afterwards recorded “in the Volume of the Book,” must have had the same Divine origin, must have been made known by the inspiration of the same Holy Spirit.
We now proceed to compare the two, and we shall see how they agree at every point, proving that the source and origin of this Divine Revelation is one and the same.