 Published by Better Publications, an imprint of the expansive Thrilling Group of pulps, "Captain Future" gave readers the only explicitly science fiction and fantasy pulp hero in the history of American pulps.The series contains a number of assumptions about the solar system which are outlandish by modern standards but which still seemed plausible, at least to the general public, in the time the stories were written.All of the planets of the solar system, and many of the moons and asteroids, are suitable for life, and most are already occupied by humanoid extraterrestrial races.