I'm pretty sure the 43B is the radius. The diameter that we can see is 93B ly according to Wikipedia. The universe is expanding which means we can see more tha

I'm pretty sure the 43B is the radius. The diameter that we can see is 93B ly according to Wikipedia. The universe is expanding which means we can see more than the age of the universe. The light from far away was carried long as the universe expanded which makes it look like traveled faster than light.