We know through observation that some things out there have causes. The light, itself, that comes to us was caused to come by the stars and other things out there. To say it isn't is a contradiction to all astronomy.

Combine that with the knowledge we have on earth of all the multitudes of causes, and the fact that we don't have even one example of anything without a cause, and all you have is more cause and still zero spontaneity without cause.

We might have evidence that there are a few hundred other planets out there, but outside of our solar system, we still don't have proof for them. Until we actually get pictures of them, there could be other causes for the effects that lead us to believe there are other planets.

If you want to be that critical, you might as well conclude that nothing exists, and that everything that we think that exists, including our thinking and identity is all spontaneous imagination of nothing. Scientifically speaking there is zero causelessness. In fact, causelessness doesn't even fit within the parameters of anything that makes sense.

Check into it.