Function getAllRetrogradePeriods

getAllRetrogradePeriods(
    bodies: CelestialBody[],
    startJD: number,
    endJD: number,
): Map<string, RetrogradePeriod[]>
Get summary of all retrograde periods for multiple bodies.
Parameters
- bodies: CelestialBody[]
  Array of celestial bodies
- startJD: number
  Start of search range
- endJD: number
  End of search range
Returns Map<string, RetrogradePeriod[]>
Object mapping body name to its retrograde periods
- Defined in transits/retrograde-transits.ts:645