Trojan (celestial body) Trojan (celestial body) In astronomy, a trojan is a minor planet or moon that shares the orbit of a planet or larger moon, wherein the trojan remains in the same, stable position relative to the larger object. In particular, a trojan remains near one of the two trojan points of stability – designated and – which lie approximately 60° ahead of and behind the larger body, respectively. Trojan points make up two of five types of Lagrangian points, and a trojan is a type of Lagrangian object. They are one type of co-orbital object. In this arrangement, the massive star
The World of Abnormal Psychology The World of Abnormal Psychology The World of Abnormal Psychology is an educational video series produced by Annenberg Media, which examines behavioral disorders in humans. The series is hosted by Dr. Philip Zimbardo of Stanford University, who is best known for his controversial Stanford prison experiment. This series builds on Zimbardo's first series Discovering Psychology and is often shown on PBS stations in the United States. The series has been used in courses at seminaries, and as a resource for teachers. The American Psychological Association lists the series under "Education and Psychology". The series has 13 episodes, each focusing on