Dexter Aspects, are those which are contrary to the succession of signs; as a planet, for instance, in Aries, casts its sextile dexter to Aquarius.
Sinister Aspect, is with the succession of signs, as a planet in Aries, for example, casts its sextile sinister in Gemini.
In addition to these, Astrologers play a number of other diverting tricks; hence we read of the Application—Prohibition—Translation—Refrenation—Combustion—Exception—Retrogradation, &c. of planets.
The Application of Planets.
Application of the planets is performed by Astrologers in three different ways.
1. When a light planet, direct and swift in its motion, applies to a planet more ponderous and slow in motion; as Mercury in 8° of Aries, and Jupiter in 12° of Gemini, and both direct; here Mercury applies to a sextile of Jupiter, by direct application.
2. When they are both retrograde, as Mercury in 20° of Aries, and Jupiter in 15° of Gemini; here Mercury, the lighter planet, applies to the sextile aspect of Jupiter; and this is by retrogradation.
3. When one of the planets is direct, and the other retrograde; for example, if Mercury were retrograde in 18° of Aries, and Jupiter direct in 14° of Gemini; in this case Mercury applies to a sextile of Jupiter, by a retrograde motion.
Prohibition,
is when two planets are applying either by body or aspect; and before they come to their partile aspect, another planet meets with the aspect of the former and prohibits it.