The Astronomy Free App includes Questions & Answers in an Easy To Use Flash Card Format! Designed as a Quick and Efficient way to Help You Study and Learn about Astronomy. How To Use This Flash Card App? When you start this App you will be able to scroll through different sets of Flash Cards that you can Study. Simply Touch The Button or Around the Edges of the Card to Flip Through Each Card! Its That Simple and Easy! Thanks For Downloading & Supporting the Astronomy - Ninja Flashcards App