1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What's a secular timescale?

  1. Apr 22, 2008 #1

    Simfish

    User Avatar
    Gold Member

    "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
     
  2. jcsd
  3. Apr 22, 2008 #2

    mgb_phys

    User Avatar
    Science Advisor
    Homework Helper

    Secular means non-periodic
    Of course you have to look at an infinite lenght 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 religous
     
  4. Apr 23, 2008 #3

    chemisttree

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    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 here and here.

    Google "secular orbit" or "secular interaction".
     
    Last edited: Apr 23, 2008
  5. Apr 23, 2008 #4

    mgb_phys

    User Avatar
    Science Advisor
    Homework Helper

    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.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: What's a secular timescale?
  1. What if (Replies: 8)

  2. What is this? (Replies: 19)

  3. What are Starquakes? (Replies: 1)

  4. What is gravity? (Replies: 21)

Loading...