One-liner GeneralPlanets have excellent orbit discipline.They stay on track for years.Why it works: This wordplay is explicitly written for Astronomy and uses subject vocabulary as the comic mechanism.Copy jokeSave▲ 0Topics connected to this jokeAstronomyAstronomy One-LinersAstronomy PunsCleanCleverFunnyOne-LinerPunSchoolSchool One-LinersSchool PunsScienceScience Classroom JokesScience One-LinersScience PunsScience Puns for the ClassroomSpaceSpace Classroom JokesSpace Puns for the Classroom