Hi Cee Dee, it is an interesting question that, but

Today I had something again explained to me from the scriptures of the bible about how this system as we know it will be destroyed and a new heavens and a new earth set up in it's place.

You can read the book of Revelation and see how we are very near to that now.

The book explains about the time we are living in and it does coincide with world events right now.

I think this particular topic is a little bit more for here and now than the one about stars and planets colliding in 41/2 million years time, because it tells us how we can survive that catastrophic event.

The bible has prophesied that there will be a great tribulation to befall this world of ours beginning with World powers turning on religion (we know that to be false religions) to destroy it, the Bible even identifies the organisation that will do that, we, all of us know of the United Nations  well it is that, that will turn on false religion.

Surely the world events that are occurring now and the fact that the United Nations are playing a part in it, is testimony to the fact that the bible is correct. We can see with our own eyes that the world is getting to hate religion and wants it done.

So we won't need to worry about collisions between star and planets in million of years time.