We would not be able to measure the expansion because our rulers are expanding as well. Unless you are saying the space-time is not expanding homogeneously...
I am an ameteur physicist (i actually have my degree in meteorology), and i have some questions about the EM properties of liquid metals or ferrous liquids when in spherical form. I understand if you are too busy or if i sound off, but if you do have the time to answer a few questions, it would...