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Qualitative overview of the precession of the equinoxes and the Milankovich theory of ice ages; part of an educational web site on astronomy, mechanics, and space ... Hipparchus concluded that the intersection marking the equinox slowly crept forward along the ecliptic, and called that motion "the precession of the equinoxes. "
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www-istp.gsfc.nasa.gov/stargaze/Sprecess.htm
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The precession of the equinoxes refers to the precession of Earth's axis of rotation with respect to inertial space. Hipparchus discovered that the positions of the equinoxes move westward along the ecliptic compared to the fixed stars on the celestial sphere.
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www.crystalinks.com/precession.html
www.crystalinks.com/precession.html
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Precession of the Equinoxes ... Because of the precession of the equinoxes, the vernal equinox moves through all the constellations of the Zodiac over the 26,000 year precession period. Presently the vernal equinox is in the constellation Pisces and is slowly approaching Aquarius.
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csep10.phys.utk.edu/astr161/lect/time/precession.html
csep10.phys.utk.edu/astr161/lect/time/precession.html
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Due to the interaction between the Earth and the Moon, the rotation axis of the Earth is not stationary. The interaction arises because the Moon is not in the equatorial plane of the Earth; there is a misalignment between ... The precession of the Earth leads to the difference between the Tropical and Sidereal years. How?
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zebu.uoregon.edu/~imamura/121/oct6/precession.html
zebu.uoregon.edu/~imamura/121/oct6/precession.html
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Axial precession (astronomy) - Wikipedia, the free encyclopedia
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In astronomy, axial precession is a gravity-induced, slow and continuous change in the orientation of an astronomical body's rotational axis. In particular, it refers to the gradual shift in the ori...
en.wikipedia.org/wiki/Axial_precession_(astronomy)
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Sorry for the week's break - it was unplanned, but I spent most of last week being dead-on-my-feet tired. ... well, I didn't feel up to all those lines I'd have had to use if I was doing it the way I normally do Precession backgrounds...
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precession.eviscerate.net/
precession.eviscerate.net/
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by Marshall Brain ... Gyroscopes can be very perplexing objects because they move in peculiar ways and even seem to defy gravity. These special properties make gyroscopes extremely important in everything from your bicycle to the advanced navigation system on the space shuttle. ... The Cause of Precession...
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www.howstuffworks.com/gyroscope.htm
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Precession is both the bane and the guaranteed meal ticket of the positional astronomer. Astronomers record the positions of celestial bodies in an equatorial coordinate system—based on the Earth's equator and poles.
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www.fourmilab.ch/yoursky/help/precession.html
www.fourmilab.ch/yoursky/help/precession.html
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