Could a Moon Have a Moon?

Could a moon have a moon?

If a moon had a moon, would we give it a name?
And if it had people, could they see things the same?

If a moon had a moon, would its planet be a star?
It’s not what we’ve seen, but we’ve only seen so far.

If its planet was a star, then what of its sun?
Would it be like the black hole ‘round which galaxies are spun?

And as galaxies speed through the expanding space,
Would that be seen differently from such a place?

But a moon can’t have a moon, from what we’ve seen,
Yet there are still infinite places that we’ve never been.