This has immediate news value, following so closely as it does on the news releases concerning plans for launching earth satellites in 1958. All sorts of questions that young and old are asking are answered simply, concisely and with John Lewellen's soundly scientific approach. How will it get up? What sort of path will it trace? What will keep it up? How long will it stay up? What kinds of instruments will it carry and what function will they serve? Diagrams and drawings by Ida Scheib provide factual and explanatory illustration. The Naval Research Laboratory is vouching for the accuracy of the text. Young science in recommended form.