Solar arc directions

In solar arc directions every point of your birth chart moves forward by the same amount: the distance the Sun travels in the days after your birth, one day for each year of life (about one degree a year). When a directed point reaches an exact aspect to a natal point, astrologers expect a turning point in that area of life, usually felt within a year either side.

About solar arc directions

Solar arcs were popularised in the 20th century by Reinhold Ebertin and later by Noel Tyl. Because every point moves by the same arc, the pattern of your birth chart stays intact and simply rotates, which makes the method simple to check against past events. The true solar arc follows the Sun’s real speed (a little faster in January than in July); Naibod and one-degree arcs are traditional averages.

Sources: Reinhold Ebertin, Applied Cosmobiology (1972); Noel Tyl, Solar Arcs (2001); Robert Hand, Planets in Transit.