If you already get all the jokes on "Big Bang Theory," you don't need this book. If you've always secretly wondered what a neutron star is, or never understood the difference between a nova and a supernova, this is the book you want. A children's book is *always* what you want if you're a chronological grownup and you need to learn something. Unlike nonfiction for adults, children's books assume you don't know anything about the given subject, and they're really nice about it.
For the record, this isn't a picture book in the classic sense. It has some serious page-count, and a way-lot of text on every page.