When you blow up a balloon, the center of expansion of its surface is not on its surface. Every point on the balloon sees things become farther. As to teleport

When you blow up a balloon, the center of expansion of its surface is not on its surface. Every point on the balloon sees things become farther. As to teleporting to the edge, there is as much an edge to the Universe as to the Earth, so the answer is: you can't teleport there.