Genesis 1:14
And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:
Psalm 19:1-7
The heavens declare the glory of God; and the firmament showeth his handiwork.
2 Day unto day uttereth speech, and night unto night showeth knowledge.
3 There is no speech nor language, where their voice is not heard.
4 Their line is gone out through all the earth, and their words to the end of the world. In them hath he set a tabernacle for the sun,
5 Which is as a bridegroom coming out of his chamber, and rejoiceth as a strong man to run a race.
6 His going forth is from the end of the heaven, and his circuit unto the ends of it: and there is nothing hid from the heat thereof.
7 The law of the Lord is perfect, converting the soul: the testimony of the Lord is sure, making wise the simple.
Hebrews 1:3
The Son is the radiance of God's glory and the exact expression of his nature, sustaining all things by his powerful word. After making purification for sins, he sat down at the right hand of the Majesty on high.
Genesis 15:5 [brackets mine]
And he brought [Abraham] forth abroad, and said, Look now toward heaven, and tell the stars, if thou be able to number them: and he said unto him, So shall thy seed be.
Galatians 3:16
Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one, And to thy seed, which is Christ.
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The stars in the heavens serve as a calendar/clock and as a witness to declare only one Person's story: the story of the Messiah. If they're used for anything other than that it's a perversion of their purpose.
Job 38:31-33
31 Can you bind the chains of the Pleiades or loosen the belt of Orion? 32 Can you bring forth the constellations in their seasons or lead out the Bear and her cubs? 33 Do you know the laws of the heavens? Can you set their dominion over the earth?
Planets
Sun: Radiance
Moon: Reflection/Accompanying
Jupiter: Righteous
Saturn: Sabbath/Peace
Mars: Blood/Sacrifice
Venus: Morning/Beauty
Mercury: Messenger
Major Constellations (in proper order)
Virgo: The Promised Seed of the virgin
Libra: The Scales of Justice paid in full
Scorpio: The One who wounds is trampled underfoot
Sagittarius: The two natured overcomer (Human & Divine)
Capricorn: Sacrificial Lamb; Transformation (resurrection)
Aquarius: Living Waters Poured Out (Holy Spirit)
Pisces: Multiplication of "Fishes" (church)
Aries: Enthronement of Lamb
Taurus: Judgment of The Nations
Gemini: The Marriage/Union/Consumation
Cancer: Gathering of The Redeemed (from four corners/winds)
Leo: Triumph and Rending of Enemies; King of All
You'll notice that the constellations are another witness to the overarching story of the Messiah found in the scriptures. It's possible that this is why the Almighty told Abraham to "count the stars" because the Hebrew word used for "count" can also mean "recount" or "tell" (as in, telling the story). The constellation images aren't based on the shapes each group of stars makes, but are based on the name each star has within each group that tells details of the story.
Isaiah 40:26
Look up and see! Who created these? He brings out the stars by number; he calls all of them by name. Because of his great power and strength, not one of them is missing.
Psalm 147:4
He telleth the number of the stars; he calleth them all by their names.
Solar and Lunar Eclipses were always warning signs of Judgment...
Joel 2:30-31
30 I will show wonders in the heavens and on the earth, blood and fire and columns of smoke.31 The sun will be turned to darkness and the moon to blood before the coming of the great and awesome Day of the LORD
Matthew 24:29
Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken:
Revelation 6:12
And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood;
While planetary conjunctions were warning signs of significance...
Matthew 2:2
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.
[Star Regulus ("king") in Leo + planet Jupiter ("righteous") = King of Righteousness (Melchi + zedek)]
Matthew 24:30
And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory.
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So the conjunction of Jupiter (righteous?) and Saturn (sabbath/peace?) in Capricorn (transformation/resurrection?) is most likely a warning sign of significance, but the knowledge was stolen and perverted so much that we can't be sure until after an event has occurred later on (if one occurs at all).