The way I see it is that she had to die to be transported great distances. The "God" of BSG is nowhere near omnipotent. 1. She intentionally got her Viper crushed in "Maelstrom" (an angel convinced her to do it). 2. She died and God resurrected her in orbit above Earth. 3. Somehow she crashed her Viper and died. Was it an accident? If so, why didn't she eject? Was she knocked unconscious? 4. She was resurrected in the Ionian Nebula. And it's not a deus ex machina. That plot device usually appears out of nowhere. They'd been setting up God since the miniseries.