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The geographic poles are defined by the points on the surface of Earth that are intersected by the axis of rotation. The pole shift hypothesis describes a change in location of these poles with respect to the underlying surface – a phenomenon distinct from the changes in axial orientation with respect to the plane of the ecliptic that are caused by precession and nutation, and is an ...
NASA computer simulation using the model of Glatzmaier and Roberts. [38] 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 vertical. The dense clusters of lines are within the Earth's core. [27]
As the celestial poles shift, there is a corresponding gradual shift in the apparent orientation of the whole star field, as viewed from a particular position on Earth. Secondly, the position of the Earth in its orbit around the Sun at the solstices , equinoxes , or other time defined relative to the seasons, slowly changes. [ 3 ]
Polar drift is a geological phenomenon caused by variations in the flow of molten iron in Earth's outer core, resulting in changes in the orientation of Earth's magnetic field, and hence the position of the magnetic north- and south poles. The North magnetic pole is approximately 965 kilometres (600 mi) from the geographic North Pole. The pole ...
NPOESS was a tri-agency program led by an Integrated Program Office (IPO) containing staff from the US Department of Defense, National Oceanic and Atmospheric Administration, and NASA. [1] NPOESS was to be operated by the NOAA/ National Environmental Satellite, Data, and Information Service (NESDIS) / NPOESS Program Executive Office Flight ...
In 2012, Teitel created the YouTube channel, The Vintage Space, [13] in which she delves into the early history of space flight. Teitel was a co-host for the Discovery Channel's online DNews channel, which later became Seeker. [14] She has also appeared on Ancient Aliens, NASA's Unexplained Files, and other cable documentary shows. [15]
He used that to propose that a 15° pole shift occurred around 9,600 BC (approx. 11,600 years ago) and that a part of the Antarctic was ice-free at that time and that an ice-age civilization could have mapped the coast. He concludes that "Antarctica was mapped when these parts were free of ice" and took the view that an Antarctic warm period ...
Jakosky heads the University of Colorado at Boulder team within the NASA Astrobiology Institute. He was a research associate at Laboratory for Atmospherics and Space Physics from 1982 to 1988. [ 1 ] He serves on numerous national advisory committees and is an associate director at the Laboratory for Atmospheric and Space Physics at the ...