From planetary movements and the exploration of our solar system to black holes and dark matter, this comprehensive reference simplifies all aspects of astronomy with an approachable question-and-answer format. With chapters broken into various astronomical studies; including the universe, galaxies, planets, and space exploration. This resource is an ideal companion for students, teachers, and amateur astronomers, answering more than 800 questions, such as: Is the universe infinite? What would happen to you if you fell onto a black hole? What are the basic concepts of Einstein's special theory of relativity? and Who was the first person in space?