This was written by Edmond Hamilton in 1939, a time when not that much was known about the other planets in our solar system. So I can accept that the author imagined steamy jungles, molten lava seas, flippered Jovian inhabitants, and ancient alien technology that reverts humans to an earlier evolutionary form. It's science FICTION.
And since this is Captain Future #1, there is, of course, a lot of backstory that provides us with our hero's origin (Is there a hero whose parent's weren't killed by the bad guys? I'm thinking Batman, Spiderman, and of course, Superman (the whole planet of Krypton blew up, for cripe's sake! The Kryptonian SCIENTISTS wouldn't listen to Jor-El, remember?).
Back to Captain Future. By the end of the book, we are absolutely clear that he has RED HAIR! He is TALL. He is STRONG. He is SMART. He is physically PERFECT. He is an ADVENTURER. So yeah, he's a HERO! I'm sure he is also Trustworthy, Loyal, Helpful, Friendly, Courteous, Kind, Obedient, Cheerful, Thrifty, Brave, Clean, and Reverent.
I did find it annoying that Crag, the giant robot, calls Captain Future "Master." Isn't that a bit demeaning for a smart, strong, and sentient AI? Also, since I've already read Captain Future #9, I can happily report that in the later stories Simon Wright, The Living Brain, advances from being carried around like a piece of luggage by Crag to zooming around on invisible traction beams!
Again, suspension of disbelief is required! I look forward to the further adventures of Captain Future.