Ecliptic

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The Ecliptic is the plane created by the apparent path of the sun as it travels through the sky, as seen from the Earth. This path is considered sacred in Vedic Astronomy [1]

The planets and the moon also travel across the sky in a narrow band very near the ecliptic. [2]

Obliquity

The ecliptic plane is not on the same plane as the Celestial equator, due to the tilt of the Earth's rotational axis. The two planes are thus apart from each other ('Oblique') by a specific angle. The Vedic astronomers generally calculated the angle as 24°. [3] Modern calculations put the angle at 23°26'[4] This angle is also known to vary over tens of thousands of years from 22.1° to 24.5°. [5]

References

  1. Template:Ref-indian-astronomy, p XX
  2. The Path of the Sun, the Ecliptic nasa.gov, via www-istp.gsfc.nasa.gov on 2011 02 09
  3. Indian Astronomy, p. XXXI
  4. Useful Constants, INTERNATIONAL EARTH ROTATION & REFERENCE SYSTEMS SERVICE, via hpiers.obspm.fr on 2011 02 09
  5. The Milankovitch Theory Kerrie Howard, November 2002, via www.emporia.edu on 2011 02 10