The planet for which to find the next perihelion/aphelion event.
Not allowed to be Body.Sun or Body.Moon.
Must match the body passed into the call that produced the apsis parameter.
An apsis event obtained from a call to SearchPlanetApsis or NextPlanetApsis.
Same as the return value for SearchPlanetApsis.
Finds the next planetary perihelion or aphelion event in a series.
This function requires an Apsis value obtained from a call to SearchPlanetApsis or
NextPlanetApsis. Given an aphelion event, this function finds the next perihelion event, and vice versa. See SearchPlanetApsis for more details.