Impressum Top: Science: Astronomy: Solar_System: Planets: This category in other languages: Spanish (142) Definition of Planet - Wikipedia - Article describes the history and present controversy surrounding the word and its applicability to various objects. International Outer Planet Watch - A program to study the time variability of the outer planets. Planet Facts - Provides photographs and information about each planet in the solar system. Welcome to the Planets - Images from NASA's planetary exploration program. zurück zur Startseite  Zahnarzt Essen  Links