USS Excelsior wrote:
Maybe the planet escaped from a parallel universe so their Earth is now missing. Then there's also that Roman Empire Earth.
You could much easier explain Roman Earth as a colony (particularly when you remember the Apollo episode) that split off eons ago. The only thing that wouldn't make sense THERE is the Roman use of colloquial English
. Something that the audience could have ignored if they hadn't made such an effort to point it out.
As for Miri's planet, again, the 'escaped from a parallel universe' runs into the 'three degrees of fandom' issue again. Granted, nearly any explanation is going to do that...