Editing Parabolic trajectory (section)

==Equation of motion==
For a body moving along this kind of [[orbit|trajectory]] the [[orbital equation]] is:
:<math>r = {h^2 \over \mu}{1 \over {1 + \cos\nu}}</math>
where:
*<math>r\,</math> is the radial distance of the orbiting body from the [[central body]],
*<math>h\,</math> is the [[specific angular momentum]] of the [[orbiting body]],
*<math>\nu\,</math> is the [[true anomaly]] of the orbiting body,
*<math>\mu\,</math> is the [[standard gravitational parameter]].