According to biographer Ray Spangenburg, these early years as Sagan tried to understand the mysteries of the planets became a "driving force in his life, a continual spark to his intellect, and a quest that would never be forgotten".
Segundo o biógrafo Ray Spangenburg, estes primeiros anos nos que Sagan trataba de comprender os misterios dos planetas convertéronse nunha forza motora na súa vida, unha faísca continua para o seu intelecto, e unha procura que xamais sería esquecida.