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To compensate, either a leap second will have to be added to the end of a day multiple times during each month, or one or more consecutive leap seconds will have to be added at the end of some or all months. [12] 1,100 As Earth's poles precess, Gamma Cephei replaces Polaris as the northern pole star. [13] 10,000
The cataclysmic pole shift hypothesisis a pseudo-scientificclaim that there have been recent, geologically rapid shifts in the axis of rotationof Earth, causing calamities such as floods and tectonic events[1]or relatively rapid climate changes. There is evidence of precessionand changes in axial tilt, but this change is on much longer time ...
Geomagnetic polarity during the last 5 million years (Pliocene and Quaternary, late Cenozoic Era). Dark areas denote periods where the polarity matches today's normal polarity; light areas denote periods where that polarity is reversed. A geomagnetic reversal is a change in a planet's dipole magnetic field such that the positions of magnetic ...
The lunar south pole is located on the center of the polar Antarctic Circle (80°S to 90°S). [2][4] (The axis spin is 88.5 degrees from the plane of the ecliptic.) The lunar south pole has shifted 5.5 degrees from its original position billions of years ago. [5] This shift has [6] changed the rotational axis of the Moon, allowing sunlight to ...
One frequently cited date was December 21, 2012. This date had many apocalyptic associations, as it was the end of a cycle in the long count in the Maya calendar. Several writers published books connecting the encounter with 2012. [23] Despite that date having passed, many websites still contend that Nibiru/Planet X is en route to Earth.
Under the Hanke–Henry Permanent Calendar January, February, April, May, July, August, October, and November have thirty days, while March, June, September, and December have thirty-one so that each quarter contains two 30-day months followed by one month of 31 days (30:30:31). While the Hanke–Henry Permanent Calendar changes the length of ...
Rotation vector m of the annual component of polar motion as function of year. Numbers and tick marks indicate the beginning of each calendar month. The dash-dotted line is in the direction of the major axis. The line in the direction of the minor axis is the location of the excitation function vs. time of year.
A geomagnetic excursion, like a geomagnetic reversal, is a significant change in the Earth's magnetic field.Unlike reversals, an excursion is not a "permanent" re-orientation of the large-scale field, but rather represents a dramatic, typically a (geologically) short-lived change in field intensity, with a variation in pole orientation of up to 45° from the previous position.