declination
81Dec. Inc. — • declination increment …
82Lunar standstill — At a major lunar standstill, which takes place every 18.6 years, the range of the declination of the Moon reaches a maximum. As a result, at high latitudes, the Moon appears to move in just two weeks from high in the sky to low on the horizon.… …
83Compass — This article is about the direction finding instrument used in navigation. For other uses, see Compass (disambiguation). A simple dry magnetic pocket compass …
84Sundial — A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating… …
85Earth's magnetic field — Computer simulation of the Earth s field in a normal period between reversals.[1] The tubes represent magnetic field lines, blue when the field points towards the center and yellow when away. The rotation axis of the Earth is centered and… …
86North Magnetic Pole — Magnetic North redirects here, for other uses see Magnetic North (disambiguation) Part of the Carta Marina of 1539 by Olaus Magnus, depicting the location of magnetic north vaguely conceived as Insula Magnetu[m] (Latin for Island of Magnets ) off …
87List of selected stars for navigation — The selected stars for navigation are often used for sextant observations. Fifty eight selected navigational stars are given a special status in the field of celestial navigation. Of the approximately 6,000 stars visible to the naked eye under… …
88Aberration of light — Light from location 1 will appear to be coming from location 2 for a moving telescope due to the finite speed of light, a phenomenon known as the aberration of light. The aberration of light (also referred to as astronomical aberration or stellar …
89Magnetismus — Magnetismus, ist die Ursache, vermöge deren ein damit behafteter Körper (Magnet) andere Körper im Allgemeinen entweder anzieht (am stärksten weiches Eisen), od. abstößt (am stärksten Wismuth), von einem zweiten Magneten aber das eine Ende anzieht …
90Deputiren — Deputiren, verb. reg. act. aus dem Lat. deputare, abordnen. Daher der Deputirte, der Abgeordnete; die Deputatiōn, so wohl die Abordnung, als auch die Abgeordneten; der Deputations Tag, an welchem sich die zu einer gewissen Absicht Abgeordneten… …
