Core & peel pears, leaving stems intact. In a small saucepan, combine juice, cinnamon sticks, star anise, honey & vanilla. Add pears; bring to a simmer. Cook, turning pears occasionally, until easily pierced with the tip of a paring knife, but not falling apart. The length of time will depend on the ripeness of pears. Remove pears from liquid using a slotted spoon & transfer to a large bowl; drain well.