because there are 100s of billions of stars doesn't say that they're all huge like our sun. The level of activity within an atom is amazing and if we were a neutron we may have an idea that the protons and the electrons are much farther than they are. Who knows how large or how small these other galaxies might be? No one. I would be guessing and so would you. You are basing your conclusions on data you don't have. You see, we will not know for sure until we actually go that far into space. That's why I say it's arrogant to say that we know what we really don't know.