import math


def solar_apparent_longitude(solar_true_longitude, julian_century):
    """Returns the SolarApparentLongitude with Solar True Longitude, 
    solar_true_longitude, and Julian Century, julian_century."""
    solar_apparent_longitude = (
        solar_true_longitude
        - 0.00569
        - 0.00478 * math.sin(math.radians(125.04 - 1934.136 * julian_century))
    )
    return solar_apparent_longitude