code: func calcSunTrueLong(sunEqCtr []float64, geomMeanLongSun []float64) (sunTrueLong []float64) {
  	if len(sunEqCtr) != len(geomMeanLongSun) {
  		return
  	}
  
  	for index := 0; index < len(sunEqCtr); index++ {
  		temp := sunEqCtr[index] + geomMeanLongSun[index]
  		sunTrueLong = append(sunTrueLong, temp)
  	}
  	return
  }
docs: // Calculate the Sun True Long in degrees based on the formula: sunEqCtr + geomMeanLongSun
  // sunEqCtr - Sun Eq Ctr calculated by the calcSunEqCtr function
  // geomMeanLongSun - Geom Mean Long Sun calculated by the calcGeomMeanLongSun function
  // Return The Sun True Long slice