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The 45th parallel north is often called the halfway point between the equator and the North Pole, but the true halfway point is 16.038487 km (9.965854 mi) north of it (at approximately 45°08'39.544") because Earth is an oblate spheroid; that is, it bulges at the equator and is flattened at the poles. [1]
50 π / 9 mrad ≈ 17.45 ... 360 is approximately the number of days in a year. ... For many practical purposes, a degree is a small enough angle that whole ...
45° S: New Zealand; Chile; Argentina: 60° S: Entirely ocean (slightly north of the South Orkney Islands); sometimes considered the northern boundary of the Southern Ocean: 75° S: Dome C, Antarctica: 90° S South Pole
Magnetic declination varies both from place to place and with the passage of time. As a traveller cruises the east coast of the United States, for example, the declination varies from 16 degrees west in Maine, to 6 in Florida, to 0 degrees in Louisiana, to 4 degrees east in Texas.
The 45th parallel south is a circle of latitude that is 45° south of the Earth's equator.. Highway sign marking the 45th parallel in New Zealand. It is the line that marks the theoretical halfway point between the equator and the South Pole.
When an object is directly overhead its declination is almost always within 0.01 degrees of the observer's latitude; it would be exactly equal except for two complications. [ 6 ] [ 7 ] The first complication applies to all celestial objects: the object's declination equals the observer's astronomical latitude, but the term "latitude" ordinarily ...
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Relationship of Earth's axial tilt (ε) to the tropical and polar circles. The Arctic Circle is the southernmost latitude in the Northern Hemisphere at which the centre of the Sun can remain continuously above or below the horizon for twenty-four hours; as a result, at least once each year at any location within the Arctic Circle the centre of the Sun is visible at local midnight, and at least ...