Astro - Grey Great Dane dog with a green collar seen on the animated cartoon THE JETSONS/ABC/1962-63. Astro (voice of Don Messick) lived with the Jetson family in the 21st Century Sky Pad Apartments. Originally, Astro was found wandering the streets by George Jetson's son, Elroy (episode "The Coming of Astro"). The family fell in love with Astro, but George decided it would be better to have an electronic guard dog named Lectronimo. It, at least, didn't eat. But when a cat burglar entered their home, Astro, not the electronic mutt, saved the day. It seems, Electronimo was programmed to attack anything in a mask. So the burglar put his mask on George Jetson and it  was "run for your life time" for old George. When Astro needed some exercise, his master George Jetson placed him on a treadmill just outside their apartment. In a later episode entitled "Millionaire Astro," Astro's original owner, the fabulously wealthy Mr. Gottrockets appeared and won Astro (originally called "Tralfaz") back in court. Eventually, when Mr. Gottrockets realized that Tralfaz was no longer happy living in a mansion, he returned the dog back to the Jetson family. Astro wears a size 36 x 17 cm sweater.