deletions | additions       diff --git a/Holman_and_Wiegert_begin_by__1.tex b/Holman_and_Wiegert_begin_by__1.tex  index 58a6194..8422d2b 100644  --- a/Holman_and_Wiegert_begin_by__1.tex  +++ b/Holman_and_Wiegert_begin_by__1.tex 
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Holman and Wiegert begin by addressing the question of where planets can last for long periods of time instead of asking how they are formed. First, they must consider what size planets can persist for long periods of time. As Szebehely found, as the mass parameter   \begin{equation}  \mu=\frac{m_2 \ (m_1 \mu= \frac{m_2}{(m_1  + m_2)} \end{equation}