First of all I wanted that I am not a physicist. I have an introductory knowledge gained from college, tv, news, magazines etc. So that's why came here with this question. I thought maybe you could help me with. So the question is simple. As technology has advanced we are able to measure distances at a smaller and smaller scale (e.g. nanometer). My question is when does this ever smaller and smaller scale stop? Or does it stop? For example, if you had one object that was measured to be 14.99 inches away from another object. How many more decimal places (e.g. 9's) can we add to this distance before one must stop? For some reason I believe that it could be infinite which makes me question what space really is. I guess that is good start so anyway I hope this interests someone.