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
Tales from the Planet Earth Tales from the Planet Earth Tales from the Planet Earth is a 1986 anthology of science fiction stories edited by Frederik Pohl and Elizabeth Anne Hull It presents 18 stories, sharing a common background developed by Pohl and Hull, by 18 authors from 18 different countries; each author's story is set in his native country. The collection was dedicated for the memory of A. Bertram Chandler and Janusz A. Zajdel. Orson Scott Card described the anthology as "a world tour of science fiction" and reported "it will make you more appreciative of the best of America sf -- and more