I may just be a little ignorant, but they are showing that as a nice little bubble expanding from our little blue ocean
Now i don't know about you but our lovely modern day signals if there are say mountains and what not between i have never found the signal to be any good. There in lays my question how did it pass though the Earth? and if it did pass around the out side how did it get out? If this is actually the case, then half that sphere and reduce the amount of people who might hear it!
