Planet When subsequent planets were discovered in the 18th and 19th centuries, the naming practice was retained with "Neptūnus" (Poseidon). Uranus is unique in that it is named for a Greek deity rather than his Roman counterpart. Some Romans, following a belief possibly originating in Mesopotamia but developed in Hellenistic Egypt, believed that the seven gods after whom the planets were named took hourly shifts in looking after affairs on Earth. The order of shifts went Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon (from the farthest to the closest planet). Therefore, the first day was started by Saturn (1st hour), second
Sagan Planet Walk obelisk for Neptune is located just across the bridge in Conley Park. The Planet Walk was conceived and built prior to Pluto losing its planetary status in 2006, and the model includes the Pluto Obelisk, which is located just outside the Sciencenter on First street. The model was expanded in 2012 to include Alpha Centauri, the star closest to the Sun. The Alpha Centauri Obelisk is exhibited at the ‘‘Imiloa Astronomy Center of Hawai‘i at the University of Hawaii in Hilo, Hawaii. This extension made the Sagan Planet Walk the world's largest exhibition. Television host and former student of Carl