<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def sunRelation(obj, sun):
 """ Returns an object's relation with the sun. """

    if obj.id == const.SUN:
        return None
    dist = abs(angle.closestdistance(sun.lon, obj.lon))
    if dist < 0.2833: return CAZIMI
    elif dist < 8.0: return COMBUST
    elif dist < 16.0: return UNDER_SUN
    else:
        return None