You know very well that I presented the NWT - your bible version - or maybe you forgot or didn't see them or something.
So, I'll give you, once again, another opportunity to go to your version and directly engage these two texts and give an explanation as to how they relate to your theology.
Psalm 102:24-27
24 I said: “O my God, Do not do away with me in the middle of my life, You whose years span all generations.
+25 Long ago you laid the foundations of the earth, And the heavens are the work of your hands.
+26 They will perish, but you will remain; Just like a garment they will all wear out. Just like clothing you will replace them, and they will pass away.
27 But you are the same, and your years will never end.
+
This is relating the eternal and immutable (unchanging) nature of YHWH.
Hebrews 1:8-12
8 But about the Son, he says: “God is your throne
+ forever and ever, and the scepter of your Kingdom is the scepter of uprightness.
* 9 You loved righteousness, and you hated lawlessness. That is why God, your God, anointed you
+ with the oil of exultation more than your companions.”
+ 10 And: “At the beginning, O Lord, you laid the foundations of the earth, and the heavens are the works of your hands.
11 They will perish, but you will remain; and just like a garment, they will all wear out,
12 and you will wrap them up just as a cloak, as a garment, and they will be changed. But you are the same, and your years will never come to an end.”
+
"about the SON", He (God v.5) speaks throughout these verses that "At the beginning, O Lord, you (the Son) laid the foundations of the earth, and the heavens are the works of your hands.
11 They will perish, but you will remain; and just like a garment, they will all wear out,
12 and you will wrap them up just as a cloak, as a garment, and they will be changed. But you are the same, and your years will never come to an end.”
+
Your own NWT demonstrates that the Son (Jesus) is revealed in the New Testament as eternal, immutable YHWH in the Old Testament.
As an aside, Your claim that Michael the Archangel became Jesus is also refuted in the next two verses of your own version:
13 But about which of the angels has he ever said: “Sit at my right hand until I place your enemies as a stool for your feet”?
+14 Are they not all spirits for holy service,
*+ sent out to minister for those who are going to inherit salvation?
Echoed in Psalm
110 Jehovah declared to my Lord: "Sit at my right hand
+Until I place your enemies as a stool for your feet.”
+
and
Ps.132:
5 Until I find a place for Jehovah, A fine residence
* for the Powerful One of Jacob.”
+ 6 Look! We heard about it in Ephʹra·thah;
+We found it in the fields of the forest.
+ 7 Let us come into his residence;
*+Let us bow down at his footstool.
+
The logical - Biblical answer to this rhetorical question of verse 13 is of course NONE. Including Michael.
