This 5-page Unit Overview and Key Words product serves as a student handout that introduces an upper middle school or early high school unit on astronomy, including the Earth, moon, Sun and our solar system. It includes enduring understandings, essential questions, science skills or outcomes, relevant unit sections, and key vocabulary terms, all in one condensed document. Finally, this document features a multi-page glossary of key vocabulary terms and their definitions, in alphabetical order.