Burmese zodiac zodiac employs eight signs in a seven-day week, with each sign representing its own day, cardinal direction, planet (celestial body) and animal; it is known as the "Mahabote zodiac". The zodiacs, with slight variations, are also found in Sri Lanka and Thailand. While the eight signs are the most prevalent in modern Burmese zodiac, the zodiac officially also recognizes a ninth sign called Ketu ( ), which rules over all of the signs. The same sign also appears in Sri Lanka and Thailand under the same name. Ketu's sign is a mythical Animal of Five Beauties called pyinsarupa ( )
Zodiac is sometimes assumed. Ptolemy also demonstrates that the principle of the tropical zodiac was well known to his predecessors within his astrological text, the "Tetrabiblos", where he explains why it would be an error to associate the regularly spaced signs of the seasonally aligned zodiac with the irregular boundaries of the visible constellations: Astronomically, the zodiac defines a belt of space extending 9° either side of the ecliptic, within which the orbits of the Moon and the principal planets remain. It is a feature of a celestial coordinate system centered upon the ecliptic, (the plane of the Earth's orbit and