In a small pan over medium-high heat, bring cider, orange juice, vanilla bean, cinnamon stick, and star anise to a boil. Place pears face down in the pan. Lower heat and simmer gently until a knife inserted into the pears meets no resistance, about 10-20 minutes. Once pears are tender, kill heat and let cool in pan. Remove to serving plates and set aside. Slice each pear from narrow to wide end in 5 or 6 slices; keep the slices attached at the narrow end. Press gently at one side to fan the pear slices.
Over medium heat, return remaining poaching liquid to a boil and reduce to a glaze. Pour over pears.
Mix orange zest with yogurt. Dollop equally on pears. Sprinkle almonds over yogurt. Serve.