Astrophysics (index)

Secular

(occurring slowly over a long period of time)

Secular, as used in Astronomy, indicates occurrence over a long period of time and not periodic. It is especially used to discuss the long-term trends in a motion that is periodic over the shorter term, such as stating that an orbit changes over time.

It is commonly used in describing dynamics and orbits. Some uses:

  • "secular variation"
  • "secular phenomena"
  • "secular perturbation"
  • "secular chaos"
  • "secular acceleration"
  • "secular drift"

It is also used in Time Series Analysis, with an analogous meaning.


(astronomy,dynamics,orbits,kinematics)
http://en.wikipedia.org/wiki/Secular_phenomena

Referenced by:
Laplace-Lagrange Secular Theory
Parallax
Perturbation Theory

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