What is the Significance of a Secular Timescale?

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Discussion Overview

The discussion revolves around the interpretation of the term "secular" in the context of timescales, particularly in relation to astronomy and mathematics. Participants explore its meaning and implications in various fields, including the distinction between short-term and long-term phenomena.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant suggests that "secular" refers to a timescale that can act on any duration, from short-term to secular, which is measured in thousands to millions of years.
  • Another participant defines "secular" as non-periodic, emphasizing the need for extensive data to determine periodicity over longer timescales.
  • A different viewpoint posits that "secular" implies "long term" rather than strictly non-periodic, especially in contrast to "short term." They reference external sources for further clarification.
  • In the context of mathematics and finance, one participant mentions that "secular variation" indicates a long-term overall trend, while in astronomy, it may refer to variations that do not repeat or are unpredictable, likening it to chaotic orbits.

Areas of Agreement / Disagreement

Participants express differing interpretations of the term "secular," with no consensus reached on its precise meaning in this context. Multiple competing views remain regarding its implications in various fields.

Contextual Notes

Participants highlight the ambiguity in the definition of "secular," noting that its meaning may depend on the specific context in which it is used, such as astronomy versus mathematics. There is also an acknowledgment of the need for extensive data to make definitive claims about periodicity.

Simfish
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"act on any time scale from short term, commensurable with the orbit periods to secular (measured in 104 to 106 years)."

is a sentence with it.

I can't google up a good definition of "secular" in this context
 
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Secular means non-periodic
Of course you have to look at an infinite length of data before you decide that it isn;t periodic on some longer timescale!

It's form the original latin secular=age, nothing to do with secular=not religious
 
I thought it meant "once in an age" or "extremely long period" rather than non-periodic. In this case I think it means "long term" considering it's usage in justaposition to 'short term' in the example sentence.

See http://www.springerlink.com/content/x7884617p417485h/".

Google "secular orbit" or "secular interaction".
 
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In maths/finance secualr variation means a long term overall trend.
In astronomy I thought it meant a variation that is doesn't repeat or isn't predictable - like a chaotic orbit.
 

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