I hope my question does not annoy or upset people (because of my high ignorance levels) but lately I have started taking some interest in cosmology. Problem is the more I read about it the more I think that it's mostly conjecture.

I mean how in the world are you guys making up theories about black holes and stuff that you only had a slight peek about? It's like you telling me about how a motherboard works when all you've seen is a minuscule solder joint from a distance.

Also you say that laws of physics are universal so which is why you an predict the qualities of a star billions of light years away yet this theory is based on a tonne of things which are missing on earth (our laws are what we have seen happening on earth since the dawn of mankind). Can you honestly say we would have predicted about birds had we never seen any flying organisms before?

I mean all we have here on earth is just a snapshot of what must be in the whole wide universe. What if there are particles that for some reason aren't present here on earth.. but what if putting them into an equation changes the law of gravity totally where instead of attracting things gravity starts repelling things; but since we've never seen those particles here, we never take them into account in our theories.

Basically how in the world are you trying to solve an equation with a billions of variables with just a dozen inputs?