Hannah understands that the moon circles the Earth, which is where we live. She also understands, roughly, that the Earth circles the sun. However, when the moon is full, there is nothing I can do to convince her that it's not, in fact, "that other planet where the robots live."
I shouldn't have let her watch Wall-E.
Nexa
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“It has always been the prerogative of children and half-wits to point out that the emperor has no clothes. But a half-wit remains a half-wit, and the emperor remains an emperor.â€
― Neil Gaiman, The Sandman, Vol. 9: The Kindly Ones