This pretty much stems from the tree falling in the woods riddle and led me to believe I am where I am for sure in the Universe, please allow me to explain...
'If a tree falls in the woods and nobody is there to hear it will it still make a sound' was put to me a year ago by the father in-law, didn't think much of it at the time but recently it started to play on my mind so much so I was stuck for an answer as its probable the tree will make a sound but then probability doesn't give a solid conclusion.
If a deaf man was stood in the woods at the time of the tree falling he would have solid evidence of it falling but still no concrete proof it made a sound other than a slight vibration through the floor, that is if the tree was big enough or maybe a little wind against his face from the draft it may have cast or perhaps the air around him may of smelt/tasted a little different with the earth and other matter being disturbed. Four out of the five senses helped him to make a bet with odds of 80% in favour of the tree making a sound but there was still a 20% of it not and if I were to strip that man of more senses eventually there would be no tree nor a woods. After getting my head around this simple but tricky concept I changed the question to 'if something happens in space am I there to observe it'.
If I trusted the man with the biggest telescope then I think it is safe to say I could see X amount of miles into space from anywhere into space in relation to the telescopes location allowing me to create a 3D image of what the universe looks like and my position within it. A real 3D map of the universe should show earth slap bang in the centre of what I can observe and yes there could be more of the universe to the left or more of it to the right but that doesn't necessarily mean it has to be there.
So logically I think I am at the centre of my universe given my knowledge of it, can anyone prove theirs is bigger?