A balanced presentation of fact and fancy, as the mysteries of the universe are presented in logical sequence, -- taking the steps easiest to explain first, and then going on to the more abstract. Bits of mythology help fix the names, and the stories that go with them. Charts and diagrams by Paul Wenck make it possible for the youngster to work it out for himself, month by month. And an excellent bibliography suggests how to go on from there. Don't try under ten years old.