now if someone says, could you push it in hyperdrive, honey? hyperdrive, i've got an infinite resistance to any change in motion now. and so we find out in the universe as we understand it in the 20th century, you can't do that. at least with material particles there is a speed limit, the speed of light. so you get that down. one of the important parts of relativity is this. before we understood relativity, we understood that the human race, no matter how sophisticated they became couldn't travel very far in space. and the reason is simple enough. the center of our galaxy for example is 20,000 light years away. it takes 20,000 years for light itself to go from the center of our galaxy to us. and our galaxy is nothing compared to the expanse of the whole universe. so how are you gonna be going through the universe when you can't even get to your galaxy, it's not gonna take you 20,000 years. if you're traveling at high, high speed, you might get there in 5 minutes. and if you travel at the speed of light, how far away would it be from a speed of