Everything changes, nothing remains without change.

Nah, most things stay the same withing quite narrow margins. The moon gets hit by a meteor now and then, but it's been essentially the same rock for some billion years.

Life didn't stay mostly the same over that time span. Evolution is a good counter to everything remaining the same under the sun.

Anyway, Buddhists and Heraclitus aren't wrong. It's just a matter of enough time and the moon will no longer be a moon.

But there are other suns :)

There are other suns that nothing new under them