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 Hand of Fear The Hand of Fear The Hand of Fear is the second serial of the 14th season of the British science fiction television series "Doctor Who", which was first broadcast in four weekly parts on BBC1 from 2 to 23 October 1976. The serial was the last regular appearance of Elisabeth Sladen in the role of Sarah Jane Smith in "Doctor Who". The serial is set at an English nuclear power station and on the planet Kastria. In the serial, the alien Kastrian Eldrad (Judith Paris and Stephen Thorne) seeks to regrow his nearly-obliterated body with radiation so he can enact