The Stars Will Aid In Her Escape?

So I have been thinking about this and about how Luna escaped after a thousand years, and I have to conclude that it was most likely a celestial event (meaning the movement of various planets in the Equestrian solar system) that is actually responsible for setting Luna free. We actually see several stars apparently converging behind the moon. But what if they were planets?

Obviously there's differences in how Equestrian cosmology and earth cosmology would work, so it is at least possible in a world where the natural system is at least partially governed by magic that the planets could align in such a fashion. And if such a alignment did occur in a world governed by magic, it might explain how Luna was able to channel the magic generated from such a event to escape from her prison.