Understanding Astronomy (Understanding)

Have you ever wondered what stars are made of, or how they blaze into life? What about how a black hole works, or whether there's alien life somewhere in the universe? These are the kinds of incredible questions that astronomers spend their days trying to answer.

Find out what they've discovered so far, how on Earth they figured it all out, and the head-scratching problems astronomers are still puzzling over in this thrilling introduction.