        “If a suitable planet were found, yes.”  Princess Celestia looked thoughtful.  “My thoughts did wander in that direction.  Starswirl the Bearded came up with a way to hold a teleport spell open, so that it acts more like a channel than a point-to-point spell, and he designed it with a safeguard so that when the field collapses, it returns the caster, and anypony who is marked with the caster, to their point of origin.”  She sighed.  “I used a slightly modified version of the spell myself, once, a long time ago, and it worked well enough.”