Peel the pears, leaving the stems intact if possible. Cut a thin slice from the bottom of each pear to create a flat base so they can stand upright.
In a saucepan large enough to hold the pears, combine the water, sugar, cinnamon stick, cloves, and star anise. Bring the mixture to a simmer over medium heat, stirring until the sugar dissolves.
Carefully place the pears in the saucepan, standing them upright. Cover the saucepan and let the pears simmer gently for about 20-25 minutes or until they are tender but not mushy. Turn the pears occasionally to ensure even cooking.
Once the pears are cooked, remove them from the poaching liquid and let them cool on a plate or a wire rack.