Is an Elephant BIG? To a mouse, yes! To a whale, NO! Is the Earth big? Compared to our Moon, yes! Compared to our Sun, NO!!!<quoted text>
Far from being a scientist at all, but then neither are you, Einstein was talking UNIVERSE, not the earth. BIG difference, and whatever's expanding NOW from the nucleus or in incomprehensible scientific terms,(to me anyhow, maybe not to you)boundary is 6,500 years old, why maybe even less, but the earth, not the universe, is billions of years old and hurtling further out in the Milky Way. The universe and the earth are two sets of things, Rogue.
Except for generalities, I will not tackle the theory of relativity. It was well explained in layman's terms in McIsaac's biography of Albert Einstein, which was most interesting but I confess to not have understood it all that well. I could use wojar's vast knowledge of the matter.
Einstein was in a trolley moving away from city hall he he noticed the clock on the tower and he visualized what would happen if he accelerated to the speed of light.
At the speed of light, the clock which was stationary, would appear to freeze. But what if you were in the clock and you saw the trolley accelerate away from you? It all depends with relativity!!!