There are different aspects to the promise to Abraham, all of which can be used to display different aspects of the Gospel and shadow pictures of Messiah.
His seed was to be as the stars (Genesis 15:5; 22:17) – This aspect will be used to share Shadow Pictures of Messiah in the skies
Astronomy & the Word
Psa 8:1 To the chief musician, on the harp. A Psalm of David. O Jehovah, our Lord, how majestic is Your name in all the earth; You have set Your glory above (על ‘al’ – above/on/upon) the heavens!
His Glory is seen in the heavens…What is the Glory of the Lord? The Lamb of God (Revelation 21:23). The Hebrew word for Glory is כבוד ‘kavod’ which comes from the root כב ‘kab’ which means a star:
Psa 8:2 Out of the mouth of babes and sucklings, You have ordained strength, because of the ones distressing You, to cause the enemy and the avenger to cease.
Psa 8:3 When I look upon Your heavens, the work of Your fingers: the moon and the stars which You have fixed;
The work of His fingers is linked to His Word
Exo 31:18 And when He finished speaking with him on Mount Sinai, He gave to Moses the two tablets of the testimony, tablets of stone, written by the finger of God.
Psa 33:6 Through the Word of Jehovah the heavens were made; and all their host were made by the breath of His mouth.
Psa 19:1 To the chief musician. A Psalm of David. The heavens are recounting (ספר ‘saphar’) the glory of God, and the expanse proclaiming His handiwork.
ספר ‘saphar’ is also used to translate the word ‘scroll.’
The Scriptures connect the heavens to a scroll
Rev 6:14 And the heaven departed like a scroll being rolled up. And every mountain and island were moved out of their places.
Isa 34:4 And all the host of the heavens shall be dissolved, and the heavens shall be rolled together like a scroll. Then all their host shall droop, as a leaf drooping from the vine, and as the drooping from a fig tree.
There are 66 words in these two verses (Revelation 6:14; Isaiah 34:4) corresponding to the 66 books in the Scriptures. This connection between 66 and the sky is further seen in the numerical value of the Hebrew word לול ‘lul.’ This word has the meaning of a winding staircase. לול ‘lul’ comes from the root word לל which pictures the night sky which is rolled out as a scroll.
Jacob experienced a ladder (staircase) which reached to heaven in which he saw the angels of God ascending and descending (Genesis 28:10-19) which pictured Christ (John 1:51) and His church (Bethel – House of God) (Genesis 28:19; Matthew 16:18; 1 Timothy 3:15).
Abraham was told to ‘tell’/ count the stars. The word translated as tell/count is ספר ‘saphar.’
Gen 15:5 And He brought him outside and said, Look now at the heavens and count the stars, if you are able to count them. And He said to him, So shall your seed be.
Gal 3:16 But the promises were spoken to Abraham and to his Seed (it does not say, And to seeds, as of many, but as of one, “And to your Seed,” which is Christ).
Paul equates the heavens with the Word/Gospel
Rom 10:16 But not all obeyed the gospel, for Isaiah says, “Lord, who has believed our report?”Isa. 53:1
Rom 10:17 Then faith is of hearing, and hearing through the Word of God.
Rom 10:18 But I say, Did they not hear? Yes, rather, “into all the earth their voice went out, and to the ends of the world their words.” LXX-Psa. 18:5; MT-Psa. 19:4
Psa 19:1 To the chief musician. A Psalm of David. The heavens are recounting the glory (Messiah is the Glory Revelation 21:23) of God, and the expanse proclaiming His handiwork.
Psa 19:2 Day by day they pour forth (a flowing out from within, related to נבא ‘nava’ prophecy) speech (אמר ‘omer’ from root מל ‘mal’ which means word), and night to night reveals (חוה ‘chavah’ this is the name of ‘Eve’ the bride) knowledge.
On a deeper level verse 2 is stating that the sun, moon and stars and their courses are prophesying the Word and revealing knowledge of the bride. The movement of the heavenly bodies teach the Gospel of Messiah and His bride (the Seed).
Psa 19:3 There is no speech, nor are there words where their voice is not heard.
Psa 19:4 Their voice is gone out into all the earth, and their words to the ends of the world.
Psa 19:5 and he comes forth like a bridegroom from his canopy. He rejoices like a hero to run a race;
Psa 19:6 his going forth from the end of the heavens, and his orbit to their ends; and nothing is hidden from his heat.
Notice the following verses in Psalm 19 speak of the Torah, linking the Scroll in heaven to the Scroll on earth
Psa 19:7 The Law of Jehovah is perfect, converting the soul. The Testimony of Jehovah is sure, making the simple wise.
Psa 19:8 The precepts of Jehovah are right, rejoicing the heart. The commands of Jehovah are pure, giving light to the eyes.
Psa 19:9 The fear of Jehovahis clean, enduring forever. The judgments of Jehovah are true, they are righteous altogether.
Psa 19:10 They are more precious than gold, even much fine gold, and sweeter than honey and drops from the honeycomb.
Psa 19:11 Also Your servant is warned by them; in keeping of them is great reward.