|Image of Black Hole Exploding Materials and Plasma|
When the planets fall off track, they land in a new path created by the exploding black hole, and their new gravitational path is now the on black hole. As the galaxy spins the stars and planets switch from their old gravitational orbit to their new one around the black hole, after so many cycles of the galaxy the stars and planets hit the hole and fall in, exploding.
According to NASA's own pictures of this black hole, Galaxy's have the ability to blow up and then spin themselves back together.
I am the origin of that theory on here today, the black hole sucks in all material and it all explodes. The material is then ejected from the black hole and then begins re-swirling which is continuous anyway and the galaxy will rebuild itself from the materials being ejected from the black hole which is used to form new galaxy's, stars and planets etc.
That all would mean that the entire galaxy can be destroyed by a black hole, then the materials would be recycled by the galaxy to form new planets out of the old materials from the black hole and then spin itself back together, of course all the stars planets would be in new positions now, probably.