Fifth planet (hypothetical) orbit as defined by the Titius–Bode law. Between 1845 and 1851, eleven additional asteroids were discovered and Jupiter had become the twentieth planet. At this point, astronomers began to classify asteroids as minor planets. Following the reclassification of the asteroids in their own group, Jupiter became the fifth planet once again. With the redefinition of the term "planet" in 2006, Ceres is now considered a dwarf planet. The disruption theory suggests that a planet which was positioned between Mars and Jupiter was destroyed, resulting in the asteroid belt between these planets. Scientists in the 20th century dubbed this hypothetical planet
Brother from the Same Planet reference a scene from the episode where Homer "argues with his own brain about a desired course of action" to illustrate self-discrepancy theory, the idea that "humans will go to great lengths to attain and preserve self-esteem". The writers of the FOX program "King of the Hill" put "Brother from the Same Planet" among the five best episodes of "The Simpsons", including "Homer the Heretic", "Lisa's Wedding", "Lisa's Substitute", and "Behind the Laughter". Mikey Cahill of the "Herald Sun" highlighted the quote "PickupBart? What the hell is PickupBart?" by Homer in his list of "Fab Fives" related to "The Simpsons".