Editing Astrological aspect (section)

=== Ptolemaic Aspects===
Since they were defined and used by [[Ptolemy]] in the 1st Century AD, the traditional major aspects are sometimes called '''Ptolemaic Aspects'''. These aspects are the Conjunction (0°), Sextile (60°), Square (90°), Trine (120°), and Opposition (180°). Major aspects are those that are divisible by 10 and evenly divided in relation to 360° (with the exception of the Semisextile and the Novile).<ref>[https://books.google.com/books?id=iqOODwAAQBAJ Claudius Ptolemy, Harmonics, book III, Chapter 9]</ref>

When calculating or using aspects, it is important to note that different astrologers and separate astrological systems/traditions utilize differing [[Celestial orb|orbs]], which is the degree of separation between exactitude. Orbs may also be subject to variation, depending on the need for detail and personal preferences. Although, when compared to other aspects, almost all astrologers use a larger orb for a Conjunction.