Here is something to ponder.
Heb 8 speaks of the FIRST COVENANT waxing old and ready to vanish, and
Heb 1 speaks of the HEAVENS AND EARTH waxing old.
Heb 8:13 KJV In that he saith, A new covenant, he hath made the first old. Now that which decayeth and waxeth old is ready to vanish away.
Heb 1:10-12 KJV And, Thou, Lord, in the beginning hast laid the foundation of the earth; and the heavens are the works of thine hands: (11) They shall perish; but thou remainest; and they all shall wax old as doth a garment; (12) And as a vesture shalt thou fold them up, and they shall be changed: but thou art the same, and thy years shall not fail.
Could Hebrews, which is about the BETTER COVENANT, have meant the TWO heavens and earth stand for the covenants? OLD and NEW COVENANTS, and OLD and NEW HEAVENS AND EARTH?
Isa 51:16 KJV And I have put my words in thy mouth, and I have covered thee in the shadow of mine hand, that I may plant the heavens, and lay the foundations of the earth, and say unto Zion, Thou art my people.