Unit One Nicolaus Copernicus 1
Unit Two Galileo 19
Unit Three Isaac Newton 37
Unit Four Albert Einstein 54
Unit Five Samuel Langley 71
Unit Six Edwin Hubble 90
Unit Seven R.Buckminster Fuller 108
Unit Eight The Wright Brothers 125
Unit Nine Robert Goddard 143
Unit Ten Igor Sikorsky 163
Unit Eleven Wernher von Braun 180
Unit Twelve Charles Lindbergh 198
Unit Thirteen Amelia Earhart 218
Unit Fourteen Jacqueline Cochran 237
Key to the Exercises 255