"To infinity and beyond"

As I've stated before, the concept of space confounds me. Space, or more specifically our own universe is a concept that we know much too little about.  The universe in my eyes is a set of infinite space that holds many mysteries and possibly many other worlds.  Come on, we can't possibly believe we are the only living organisms in an infinite amount of space.  Yes, the universe is awe inspiring and I am sure it is amazing to see our tiny little world from space.  However, the fear of the unknown is what gets to me.  Are there parallel worlds to ours out there?  Our galaxy contains many other planets, that which we know very little about.  Yet, there are other galaxies that contain what?  There is too little known about our universe.  We are destroying our part in this universe and now searching for other options?  Is the human race really even an integral part of the universe or are we the only part of the universe that matters? 
     My description of the universe is pretty simple.  The universe, is at this point, what we have discovered about it.  It is an awe inspiring concept that has its own beauty but is frightening in the sense we do not really have a definition for the universe because we are such a small part of it.  From what I've learned about space travel and preparation in the book Packing for Mars by Mary Roach the universe holds many mysteries but an amazing sense of freedom.  The universe is a weightless void that is a beautiful scene but very deadly.  It should be respected and feared but also admired.