Thank you, Craig, for your detailed explanation, and for this excellent website. You express yourself just as well as the other Craig in 'Strictly Come Dancing!'
The movements that are happening without our awareness are mind-boggling. The earth is going around on its axis at 1000 miles an hour then, at much faster speeds, the earth is travelling around the sun and our solar system is going around the galaxy. Presumably the galaxy is also going around with its local cluster of galaxies. On top of this, the expansion of the universe at the phenomenal rate you describe is absolutely awe-inspiring, and our universe must be unimaginally huge after all those billions of years. If we ever hit another expanding universe coming our way it will solve all our problems instantly!
One thing that used to puzzle me as a child, and still does, is why there is something rather that nothing, but I don't think any human being can answer this satisfactorily.

Best wishes

David