Traditional methods for calculating horoscopes and drawing charts unfortunately do not suit all geographic regions equally well. Especially birth places near and beyond the polar circles are problematic, that is on latitudes near 66°34 north or south and beyond. Birth places on the southern hemisphere, too, are prone to confuse astrologers, as soon as there are questions regarding the concrete view of the sky.
At first sight, with superficial reasoning, the rectification, or correction, of a given birth time seems appropriate and necessary: We certainly do need an exact and reliable basis for any astrological interpretation. However, none of the diverse methods of rectification provides the desired safety or assurance.
For decades, researchers have been baffled by the intricate bronze mechanism of wheels and dials created 80 years before the birth of Christ. The "Antikythera Mechanism" was discovered damaged and fragmented on the wreck of a cargo ship off the tiny Greek island of Antikythera in 1900.