from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of or pertaining to precession
from the GNU version of the Collaborative International Dictionary of English
- adj. Of or pertaining to pression.
from The Century Dictionary and Cyclopedia
- Pertaining to or resulting from the precession of the equinoxes: as, precessional force.
- Of or pertaining to the phenomenon of precession in general. See precession, 4.
Sorry, no etymologies found.
Thus astronomers must have made great progress in their science before they could select as a day for counting from, the epoch when the slow reeling motion of the earth (the so-called precessional motion) brought the Pleiades centrally south, at noon, at the time of the vernal equinox.
When these blades rotate they create large gyroscopic forces sometimes called precessional forces.
In his Galactic Alignment theory, John Major Jenkins describes the coming 2012 event as the "precessional convergence of Milky Way and solstice sun."
The climate change in this period is generally believed to be associated with precessional changes in the distribution of solar radiation, which primarily affect land-sea temperature contrast, and give only a regional warming, plus an enhancement of certain monsoonal circulations.
Laskar, J. et.al., "Orbital, precessional, and insolation quantities for the Earth from -20 MYR to +10 MYR"; Astron.
The interglacial thus lasts an additional precessional cycle, yielding a total duration of 28 kyr.
Consider how long it took Milankovitch to calculate variation of insolation every year for 600,000 years for every 5° of latitude due to orbit, tilt and precessional changes.
I thought of the great precessional cycle that the pole of the earth describes.
Instead of discarding his value as too slow and accept - ing their own more rapid rate of 1° in 66 years as constant, some of them revived an ancient notion that the precessional speed swung back and forth between
The fact of the precessional motion, already known to the