- Script
- Sy Reit (credited)
- Pencils
- Bob White (credited)
- Inks
- Terry Szenics (credited)
- Colors
- ?
- Letters
- ?
- Genre
- humor; science fiction
- Characters
- Cosmo; Orbi; Professor Thimk; Astra
- Synopsis
- Cosmo and his cowardly pal Orbi are chosen to man the first Martian expedition to Earth, but the rocket crash-lands on the Earth's moon instead.
- Reprints
Story features minor grammatical changes from original. The "Cosmo the Merry Martian" logo is also inserted on page one and the story title is shrunk to fit.
- Script
- Sy Reit
- Pencils
- Bob White
- Inks
- Terry Szenics
- Colors
- ?
- Letters
- ?
- Genre
- humor; science fiction
- Characters
- Cosmo; Orbi; Moonlings
- Synopsis
- Cosmo and Orbi meet the creatures who live on the Earth's moon, all of whom are named "Oog." The Moonlings show the visitors their civilization, and explain that they are invisible to Earth people.
- Reprints
Changes include the removal of Chapter 2 above the story title. Features a full-page map of Moon City.
- Script
- Sy Reit
- Pencils
- Bob White
- Inks
- Terry Szenics
- Colors
- ?
- Letters
- ?
- Genre
- humor; science fiction
- Characters
- Cosmo; Orbi; Moonlings
- Synopsis
- After spraying Cosmo and Orbi with "comet dust" so they, too, will be invisible on Earthlings, the Moonlings take the Martians to Earth, where they observe the planet's most fascinating and complex activity: a baseball game.
- Reprints
Story includes grammatical changes from original and removal of the policemen's gloves and Chapter 3 above the story title. In the ball game sequence, one of the advertisements is for the comic series Pat the Brat. In the next issue tease, Cosmo the Merry Martian is replaced by World of Archie.