Because of the precession of the equinoxes, the two systems do not remain fixed relative to each other but drift apart by about 1.4 arc degrees per century.
32.
His trepidations method to describe precession of the equinoxes " De motu octau?Sph�r " was posthumously challenged in 1524 by Nicolaus Copernicus in The Letter against Werner.
33.
The precession of the equinoxes is regarded as the most important orbital parameter in the formation of the " green Sahara " and " desert Sahara " cycle.
34.
Because of a phenomenon known as the precession of the equinoxes, the poles trace out circles on the celestial sphere, with a period of about 25, 700 years.
35.
He also determined the precise value of 51 arcsec for the annual precession of the equinoxes and contributed to the construction and usage of some astronomical instruments including the astrolabe.
36.
In the case of Earth, this type of precession is also known as the " precession of the equinoxes ", " lunisolar precession ", or " precession of the equator ".
37.
It has been noticed, and the Sothic cycle confirms, that Sirius does not move retrograde across the sky like other stars, a phenomenon widely known as the precession of the equinox.
38.
Due to the precession of the equinoxes the December solstice no longer takes place while the sun is in the constellation Capricornus, as it did until 130 BCE, but the Sagittarius.
39.
The magnitude of those errors increases with the time difference between the date and time of observation and the date of the coordinate system used, because of precession of the equinoxes.
40.
According to Giorgio de Santillana, professor of the history of science at MIT, and student of mythology, the sampo and the world pillar both refer to the precession of the equinox.
