Space Stars Space Stars ran four cartoon segments each week: Space Ghost, The Herculoids, Teen Force, and Astro and the Space Mutts. The cartoons would occasionally cross-over into one another. Space Ghost and the Herculoids both had their own respective series in the mid-1960s. Teen Force and Astro and the Space Mutts are both new segments, although the Astro character was originally the family dog from The Jetsons.