Reading these space adventures in order, it almost seems the writer and/or editor threw up their hands and said, "This secret identity shtick isn't working. Let's dump it." After the last space story there was only one more issue of CM's comic. Strangely it was a throwback to earlier days, complete with Icky's idiot alter-ego Sgt. Twilight. No mention was made of Cap's interplanetary travels, the "newly-formed space force," or anything else in the three previous issues. I guess the powers that be changed their minds again and decided to restore the status quo--then Fawcett pulled the plug on their comics and that was the end of it.
By the way, I love Zog's volcano head with the Saturnian ring around it.
Link to the book:
Captain Midnight in Outer Space