AsThe covenant between Yehovah and Noah is unconditional in relation to our earth and the heavenly bodies around it.
It may not be that those things don't exist. Only concerning the people this wont effect them.
But in light of Revelation, we can expand the thought a bit "As long as this age enduresendures". We factor that in talking about Eternity and the three world ages.
2 Peter 3 teaches there are three ages of time. Often translated into the base English word, World.
The world that then was, The current world reserved for Judgment of the ungodly. The new heavens and earth age
Revelation 21-22 kjv
21 And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.
The Bible calls on a greater theology when talking about the Earth.
This link can brake down some difference you have to be aware of from Hebrew to Greek when the word appears in English.