John Jacob Astor 
A Journey in Other Worlds 
A Romance of the Future

In this science fiction classic we meet President Bearwarden, Dr. Cortlandt and Ayrault approaching Jupiter in their spaceship, Callisto. The three explorers travel the galaxy from Jupiter to Mars to Saturn and the wide spaces in between before returning to Mother Earth.

This space saga was written by the American businessman John Jacob Astor, a member of the prominent Astor family.