I don't know much about astrophysics and have never studied it. So, if I am wrong at any point, kindly correct me. It is said the whole space-time fabric itself is expanding after the big-bang. If this is so then why do we at all feel the recession of the heavens? I will try to elaborate my confusion. If the underlying space-time itself is expanding, all the corresponding ways to measure length-time should experience similar expansion. Like if you are on the surface of the balloon (neglect the curvature), and you draw a 1 cm line to define a cm, then you use that line to measure another object as 3 cm. Now let the balloon inflate and the standard line now becomes of 2 cm (say). The previously measured object will now be 6 cm (due to expansion). But using the standard line, the measured object will still be of 3 cm. So, staying within the universe of the balloon, it is not possible to know if the balloon is expanding or not. Similar arguments can be given for time also. I hope the question is not stupid.