deletions | additions       diff --git a/Now_that_we_understand_why__.tex b/Now_that_we_understand_why__.tex  index 669987b..ab5a356 100644  --- a/Now_that_we_understand_why__.tex  +++ b/Now_that_we_understand_why__.tex 
...
where G is the known gravitational constant ($6.674 \cdot 10^−11 \textrm{ N m^2 / kg^2}$), $V_{orb}^2$ is the orbital velocity, and r is the semi-major axis.  In order to find $V_{orb}$, by using basic geometry,  the equation is as follows: \begin {equation}  V_{orb} = V_r / Sin(\theta)