In the cold, dark, lonely environment of the outer reaches of the Solar System lies Pluto, the smallest and most distant planet in the sun's family. Because it is so far away, Pluto remains largely mysterious. Yet in recent years astronomers have found important clues to its physical features, formation, and relationship with its single moon, Charon.
Don Nardo (born February 22, 1947) is an American historian, composer, and writer. With close to four hundred and fifty published books, he is one of the most prolific authors in the United States, and one of the country's foremost writers of historical works for children and teens.