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.
Feel the Fear completes three challenges over two days, two on day one and another on day two. These increase in difficulty as they progress, and the final challenge really determines whether the fear has been overcome or not. During the challenges a phobia expert, Anjula Mutanda, monitors the heartbeat of the contestant in order to find out whether they are 'feeling the fear'. There is also a 'body burst' section, in which Anjula explains, with the aid of an animated sequence, the science behind the fears and the body's reactions to these. Below is a list of the episodes broadcast, in transmission