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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 ...
The Doomsday rule, Doomsday algorithm or Doomsday method is an algorithm of determination of the day of the week for a given date. It provides a perpetual calendar because the Gregorian calendar moves in cycles of 400 years. The algorithm for mental calculation was devised by John Conway in 1973, [ 1 ][ 2 ] drawing inspiration from Lewis ...
N g is geographic or true north, N m is magnetic north, and δ is magnetic declination. Magnetic declination (also called magnetic variation) is the angle between magnetic north and true north at a particular location on the Earth's surface. The angle can change over time due to polar wandering.
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 ...
Sunrise equation. A contour plot of the hours of daylight as a function of latitude and day of the year, using the most accurate models described in this article. It can be seen that the area of constant day and constant night reach up to the polar circles (here labeled "Anta. c." and "Arct. c."), which is a consequence of the earth's inclination.
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 ...
The International Fixed Calendar (also known as the Cotsworth plan, the Cotsworth calendar, the Eastman plan or the Yearal) [ 1 ] was a proposed reform of the Gregorian calendar designed by Moses B. Cotsworth, first presented in 1902. [ 2 ] The International Fixed Calendar divides the year into 13 months of 28 days each.
No guidance is provided about conversion of dates before March 5, -500, or after February 29, 2100 (both being Julian dates). For unlisted dates, find the date in the table closest to, but earlier than, the date to be converted. Be sure to use the correct column. If converting from Julian to Gregorian, add the number from the "Difference" column.