Sentences with phrase «axis precess»
Not only does the axis precess (every 51,000 years), but the proximity of Jupiter offers a strong gravitational forcing function that modifies the eccentricity of its orbit and the obliquity (tilt) of the spin axis.
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The Earth's axis wobbles or «precesses» on a 26,000 - year cycle; it changes its average tilt on a 41,000 - year cycle; and it shifts its orbit from being roughly circular to more elliptical on a 100,000 - year cycle.
The aligned hydrogen nuclei are not stationary, but precess about their axes like children's tops.
As the compact object spinned, it might have wobbled or precessed about its axis, like a child's top winding down.
Precession refers to the fact that both Earth's rotational axis and orbital path precess (rotate) over time — the combined effects of these two components and the eccentricity produce an approximately 21,000 - year cycle.