True polar wander is a solid-body rotation of a planet or moon with respect to its spin axis, causing the geographic locations of the North and South Poles to change, or "wander". In a stable state, the largest moments of inertia axis is aligned with the spin axis, with the smaller two moment of inertia axes lying in the plane of the equator. When this is not the case, true polar wander will occur: the planet or moon will rotate as a rigid body to realign the largest moment of inertia axis with the spin axis.
Other articles related to "polar, true polar wander, polar wander":
... In geometry, the polar angle may be one of the two coordinates of a two-dimensional polar coordinate system one of the three coordinates of a three-dimensional spherical coordinate system in this case it ...
... While there are reputable studies showing that true polar wander has occurred at various times in the past, the rates are much smaller (1° per million years or slower) than predicted ... last 130 million years, contradicting the hypothesis of a cataclysmic polar wander event ... More rapid past possible occurrences of true polar wander have been measured from 790 to 810 million years ago, true polar wander of approximately 55° may have ...
... See cataclysmic pole shift hypothesis for a discussion of various historical conjectures involving rapid shift of the poles ... Polar motion Axial tilt Apparent polar wander ...
... However, in what is known as true polar wander, the solid Earth can rotate with respect to a fixed spin axis ... Research shows that during the last 200 million years a total true polar wander of some 30° has occurred, but that no super-rapid shifts in the Earth's pole ... A characteristic rate of true polar wander is 1° per million years or less ...
... There were 354 households out of which 38.4% had children under the age of 18 living with them, 68.1% were married couples living together, 6.5% had a female householder with no husband present, and 20.6% were non-families. 17.8% of all households were made up of individuals and 7.3% had someone living alone who was 65 years of age or older ...
Famous quotes containing the words wander, true and/or polar:
“See how the sacred old flamingoes come,
Painting with shadow all the marble steps:
Aged and wise, they seek their wonted perches
Within the temple, devious walking, made
To wander by their melancholy minds.”
—William Butler Yeats (18651939)
“True friendship destroys envy, and true love destroys coquetterie.”
—François, Duc De La Rochefoucauld (16131680)
“In time your relatives will come to accept the idea that a career is as important to you as your family. Of course, in time the polar ice cap will melt.”
—Barbara Dale (b. 1940)