What's inside a black hole? What are the sounds we hear from the depths of space? How did the moon form? When it comes to the realm beyond our planet, there are a whole lot of questions we're still trying to answer. Get ready to explore the unknown and discover how scientists are working to solve the mysteries of our universe.With a focus on the scientific method and enquiry, this book uses engaging text and eye-catching photos to show readers how scientists continue to push the boundaries of our knowledge and explain why some questions may never be answered.