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Showing posts with label Precession of Equinoxes. Show all posts
Showing posts with label Precession of Equinoxes. Show all posts
Thursday 14 January 2016
Monday 12 May 2014
PRECESSION OF EQUINOXES
PRECESSION OF EQUINOXES / PRECESSION (SAMPĀT-CHALANAM)
Dictionary meaning: Precession is a comparatively slow gyration of the rotation axis of a spinning body about another line intersecting it so as to describe a cone.
• The Earth's axis rotates (precesses) just as a spinning top does. The period of precession is about 26,000 years.
• Therefore, the North Celestial Pole will not always be point towards the same starfield.
Precession is caused by the gravitational pull of the Sun and the Moon on the Earth. Motion of the equinoxes along the ecliptic (the plane of Earth’s orbit) caused by the cyclic precession of Earth’s axis of rotation.
Dictionary meaning: Precession is a comparatively slow gyration of the rotation axis of a spinning body about another line intersecting it so as to describe a cone.
• The Earth's axis rotates (precesses) just as a spinning top does. The period of precession is about 26,000 years.
• Therefore, the North Celestial Pole will not always be point towards the same starfield.
Precession is caused by the gravitational pull of the Sun and the Moon on the Earth. Motion of the equinoxes along the ecliptic (the plane of Earth’s orbit) caused by the cyclic precession of Earth’s axis of rotation.
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