Defining Nothingness

Im usually not very philosophical but there are some things which although scientific in nature cannot be described without being philosophical. One such thing is the inability of the human mind to grasp the simplest thing in the universe. Something that simply has nothing to be understood about. Something that has no property. Im talking about nothing. Its rather strange that we have to associate nothing with something in order to understand it. Some people associate nothing with the dark, some associate with a closed room with 'nothing' inside it. But what we don't realize or ignore is that nothing is not something. We cannot see nothing we cannot smell nothing. Nothing is at the end of the universe which again brings in a lot of imaginative stuff. What comes at the end of the universe? Almost everyone agrees universe is finite but what is beyond that ? If we travelled to the end of the universe what would we see? Even if we don't see anything it doesn't mean its nothing because we are aware of its existence and that's a fact about nothing that it doesn't exist or its existence can't be proved. So that brings me to what I would call the ultimate question, does 'nothing' exist? Maybe its things like that which make us human, the fact that we simply cannot grasp something that isn't around us. We are not machines that would assign nothing=NULL, which although is value zero in its registers but for all purposes serves as nothing. Maybe I should leave it that, the more I think about nothingness the more nothingness I destroy.