I believe we have all read the science fiction genre, which weaves us a rich plot, the ups and downs of another kind of journey different from the real life. There are descriptions of how to get to the center of the earth, as well as the discovery of a new planet in space, what happened on the new planet, how to survive there, and so on all kinds of bizarre scenes. These fantasies, from the 17th century all the way up to Tsiolkovsky's "To the Moon," have taken us to distant and unfathomable worlds.