Leo Marriott has watched the stars since he was a child. A sailor, pilot, and air traffic controller, he has always needed to know where he is and what information the objects around him can provide. As the author of more than 20 books, including a best seller on the Titanic, he has proved his ability to explain things clearly, in a text that is free of jargon and designed to educate and illuminate. He currently works for Airbus of Filton.