hihi Janokiss and Jonny S,
And congradulations on your first post Jonny S. The table cloth analogy kinda helps in the understanding.
I am definitely one of the mere mortals with no physics degree.
All this came about with me buying my first telescope 2 weeks ago and just made me wonder about space travel and such. Before my telescope I woundn't even have found this topic remotely interesting.
But now its like gee - I can't get enough.