code: func calcSunAppLong(sunTrueLong []float64, julianCentury []float64) (sunAppLong []float64) {
  	if len(sunTrueLong) != len(julianCentury) {
  		return
  	}
  
  	for index := 0; index < len(sunTrueLong); index++ {
  		temp := sunTrueLong[index] - 0.00569 - 0.00478*math.Sin(deg2rad(125.04-1934.136*julianCentury[index]))
  		sunAppLong = append(sunAppLong, temp)
  	}
  	return
  }
docs: // Calculate the Sun App Long in degrees based on the formula: sunTrueLong-0.00569-0.00478*sin(deg2rad(125.04-1934.136*julianCentury))
  // sunTrueLong - Sun True Long calculated by the calcSunTrueLong function
  // julianCentury - Julian century calculated by the calcJulianCentury function
  // Return The Sun App Long slice