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 fully updated resource is an ideal companion for students, teachers, and amateur astronomers, answering more than 1,000 questions, such as <i>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?</i><br>