two-pole system
21Amundsen–Scott South Pole Station — Coordinates: 90°00′S 139°16′W / 90°S 139.267°W / 90; 139.267 …
22Celestial coordinate system — For other uses of Celestial , see Celestial (disambiguation). Orientation of Astronomical Coordinates Orientation of the galactic, ecliptic and equatorial coordinate systems, projected on the celestial sphere, showing the galactic equator (black) …
23Celestial pole — The north and south celestial poles and their relation to axis of rotation, plane of orbit and axial tilt …
24Coordinate system — For geographical coordinates on Wikipedia, see Wikipedia:WikiProject Geographical coordinates. In geometry, a coordinate system is a system which uses one or more numbers, or coordinates, to uniquely determine the position of a point or other… …
25List of Indianapolis 500 pole-sitters — Winners of the Pole position for the Indianapolis 500 Mile Race. The pole position is the first starting position, and is held in high prestige at Indianapolis. Due to the nature of qualifying for the Indianapolis 500, the polesitter is normally… …
26North Pole, Alaska — North Pole   City   An aerial view of North Pole, looking north, with the Tanana River to the southwest of it …
27Geodetic system — For other uses, see Geodetic. Geodesy Fundamentals …
28Digital Access Carrier System — (DACS) is the name used by British Telecom (BT Group plc) in the United Kingdom for a 0+2 Pair gain system. Two Telspec DACS remote units mounted on a pole Contents 1 Usage …
29Nervous system — Nerve redirects here. For other uses, see Nerve (disambiguation). This article is about the nervous system. For parts of the nervous system commonly called nerves, see Peripheral nerve. Nervous system The Human N …
30digestive system, human — Introduction the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract (alimentary canal), or the series of structures and organs through which food and liquids pass… …
