Editing Parabolic trajectory (section)

==Velocity==
The [[Kinetic energy|orbital velocity]] (<math>v</math>) of a body travelling along a parabolic trajectory can be computed as:
:<math>v = \sqrt{2\mu \over r}</math>
where:
*<math>r</math> is the radial distance of the orbiting body from the [[central body]],
*<math>\mu</math> is the [[standard gravitational parameter]].

At any position the orbiting body has the [[escape velocity]] for that position.

If a body has an escape velocity with respect to the Earth, this is not enough to escape the Solar System, so near the Earth the orbit resembles a parabola, but further away it bends into an elliptical orbit around the Sun.

This velocity (<math>v</math>) is closely related to the [[kinetic energy|orbital velocity]] of a body in a [[circular orbit]] of the radius equal to the radial position of orbiting body on the parabolic trajectory:
:<math>v = \sqrt{2}\, v_o</math>
where:
*<math>v_o</math> is [[Kinetic energy|orbital velocity]] of a body in [[circular orbit]].