It's Official: We Were WRONG About the Big Bang

Here’s what I’ve never understood.  If the increased separation between celestial objects is entirely caused by the expansion of space itself…. Wouldn’t the expansion of space cause celestial objects (such as the earth and sun) to themselves expand in size along with space?  If that happened, then there would be no relative change in position between celestial objects. The raisins, bread and ruler all expand together. Given that this is not what’s observed it must be that space expands, but celestial objects do not expand with it.  So celestial objects are continually *shrinking* in relative size in space?  Why would that be?