This is part one of the fourth volume of Gargatholil's 4-volume work, Depth Astrology: An Astrological Handbook--the first comprehensive handbook interpreting the astrological symbol set in the tradition of such pioneers as Dane Rudhyar, Liz Greene and Stephen Arroyo. In this volume, the meaning of each of the six major astrological aspects for each possible planetary aspect is interpreted using the psycho-transformative depth astrology approach. "Planets" include the 10 traditional astrological planets, the Ascendant and Midheaven, the Moon's Nodes and the Part of Fortune. Part one of this volume covers the aspects of Sun through Venus. Possible planetary aspects are limited to binary aspects and to those aspects occurring in the twentieth century and in the twenty-first century till 2013. Each interpretation contains: an explanation of the interaction between the two aspecting planets, the essential meaning and potential manifestations of each planetary aspect (conjunction, sextile, square, trine, opposition and, in most cases, quincunx), the transcendent potential of the planetary placement, and manifestations of the planetary placement from a place of insecurity. Planetary combinations are arranged factorially, so that planetary aspects are not repeated once interpreted. Depth Astrology - Planets in Aspect is a valuable tool for the novice just entering the field of depth astrology, for the astrological professional desiring a look-up of planetary interpretations that provide guidance to the unfolding potentialities of planetary placements, or for anyone seeking to use the astrological symbol-set as a tool for self-discovery and growth. Novices are encouraged to purchase Volume 1 - Introduction.