Talk:Dynamical time scale

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[edit] Dynamical and Free-Fall Time

The article seems to indicate that dynamical and free-fall times are the same. However, they are not. The article should be changed to reflect this. Privong (talk) 22:56, 23 January 2008 (UTC)

Well, if you know how they differ, change the article. --Neo (talk) 08:29, 24 January 2008 (UTC)

[edit] Stellar Astrophysics Formula

The formula was recently changed to $\tau_{dynamical} \simeq \frac{R}{v} = \sqrt{\frac{R^3}{2GM}}$ by an anon. I have in my Astronomy notes that the formula is equal to $\tau_{dyn} \simeq \sqrt{\frac{R^3}{GM}} \simeq \frac{1}{\sqrt{G\langle\rho\rangle}}$ . Does anyone know which one is right? I can't seem to find a reference for one way or the other. --pie4all88 (talk) 08:01, 28 January 2008 (UTC)