Erin raised her hand and said, "There would be 8 major planets in the solar system, Professor," she paused for a split second, she'd recited this also at her Muggle school. "Starting from the inner ones would be Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. There are also Ceres, Eris, Makemake and Haumea together with Pluto are called dwarf planets. "