The heavens (skies) display a parable which points to the Word of God, Jesus Christ.
Gen 1:18 and to rule over the day and over the night; and to divide between the light and the darkness. And God saw that it was good.
The word translated as ‘rule’ here is from the Hebrew משל ‘mashal’ which means to rule, compare, a proverb or a parable.
The Word of God is likened to a parable
Psa 78:1 A Lesson of Asaph. O my people, listen to my law; bow your ears to the words of my mouth.
Psa 78:2 I will open my mouth in a parable; I will pour forth dark sayings of old,
Mat 13:34 Jesus spoke all these things in parables to the crowds, and He did not speak to them without a parable,
Mat 13:35 so that was fulfilled that spoken through the prophet, saying: “I will open My mouth in parables; I will speak out things hidden from the foundation of the world.” Psa. 78:2
His Name is the Word of God
Rev 19:13 and having been clothed in a garment which had been dipped in blood. And His name is called The Word of God.
The Hebrew word for heavens, is שמים ‘shamayim’ which comes from the root word שם ‘shem’ (name).
Keil & Delitzsch commentary on Psalm 8:1
(Heb.: 8:2-3) Here, for the first time, the subject speaking in the Psalm is not one individual, but a number of persons; and who should they be but the church of Jahve, which (as in Neh_10:30) can call Jahve its Lord (אֲדֹנֵינוּ, like אֲדֹנָי from אֲדֹנִים plur. excellentiae, Ges. §108, 2); but knowing also at the same time that what it has become by grace it is called to be for the good of the whole earth? The שֵׁם of God is the impress (cognate Arabic wasm, a sign, Greek σῆμα) of His nature, which we see in His works of creation and His acts of salvation, a nature which can only be known from this visible and comprehensible representation (nomen = gnomen).
When we look up to the heavens we see the Word of God displayed in parable form. The study of Astronomy leads one directly to God.
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 – above/on/upon) the heavens!