If the sky that we look upon/
Should tumble and fall/
And the mountain should crumble to the sea/
I won't cry, I won't cry/
No I won't shed a tear/
Just as long as you stand, stand by me
Science fiction writers, I am sorry to say, really do not know anything. We can't talk about science, because our knowledge of it is limited and unofficial, and usually our fiction is dreadful.