diurnal motion

(Astronomy) motion that occurs during the day or daily, such as the diurnal rotation of the celestial sphere

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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There was an astronomer, who had undertaken to place a sun-dial upon the great weathercock on the town-house, by adjusting the annual and diurnal motions of the earth and sun, so as to answer and coincide with all accidental turnings of the wind.

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The four directions on the horizon were associated with the four kukulu, or supporting pillars of heaven, with the diurnal motion of the sun, and with the motion of the trade-winds.

The four pillars: #space #form #tribal #flow #waveforms

Since, by definition, there should be no retrograde quasi-diurnal motion of the pole in either reference frames, we chose only one complex integration constant (initial position of the pole) and constrain the other one so that the free diurnal motion disappears.

Geophysical fluids from different data sources, geomagnetic jerks, and their impact on earth's orientation

The biggest problem is atmospheric refraction, which increasingly slows the apparent diurnal motion of stars as they appear farther from the zenith.

The telescope drive master: there's a new wrinkle in the centuries-old quest for the perfect telescope drive

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