Celestial navigation Celestial navigation Celestial navigation, also known as astronavigation, is the ancient and modern practice of position fixing that enables a navigator to transition through a space without having to rely on estimated calculations, or dead reckoning, to know their position. Celestial navigation uses "sights", or angular measurements taken between a celestial body (e.g. the Sun, the Moon, a planet, or a star) and the visible horizon. The Sun is most commonly used, but navigators can also use the Moon, a planet, Polaris, or one of 57 other navigational stars whose coordinates are tabulated in the nautical almanac and air almanacs.
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