A platic aspect is one which has a wide orb but is still considered significant enough to include in a horoscope interpretation. For example, for two planets to be in opposition they do not have to be separated by exactly 180 degrees: the aspect is still valid if the angle is 175 degrees or 185 degrees. The margin of deviation or inexactness allowed for an aspect to remain valid. Moonlight refracted through the atmosphere cast a halo or orb effect as a 'ring around the moon'
