What does the term "big bang" refer to?How was the solar system formed?Why does the moon's shape change from one night to another?How are stars born, and do they really die?What is a black hole?Are we alone in the universe?Through a lively assortment of personal thoughts, stories, scientific explanations, newspaper clippings, pictures and illustrations, Professor Genius has assembled the perfect reference to accompany children ages 10 and over in their exploration of the universe.