Could someone please "spain" what a Dexter Aspect is?  I am teaching myself Western Astrology and came across the term in an aspects chapter of a very old book, published during '87.
Thanks,
"Wolf"[/i]

Hi Medicine Wolf,

I am not sure if posting links is allowed but
there is this .... from a web site

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AN UNDERSTANDING TO THE EFFECTS OF SINISTER AND DEXTER ASPECTS

by : Andrew J. Bevan, QHP, DMS Astrol. (c) 1998-2009

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Sinister and Dexter aspects

The term "Sinister" and "Dexter" occasionally appear in texts of classical astrology and provide a more careful description of the working of an aspect formed between two planets, or cast from a planet to an angle. The rules add to a more accurate chart interpretation, but unfortunately the subject has been due to much confusion and error, as can be seen in many textbooks. Therefore, a correct explanation has been badly in need.

A Sinister aspect is performed when a swifter planet applies to an aspect cast ahead of itself in the zodiac. A Dexter aspect is formed then the applying planet casts its aspect backwards, against the flow of the signs. The sinister or dexter aspect involves both of those planets that are in aspect. Take the example of Mercury in 6 Aries and Mars in 6 Leo; if Mars is the significator, then Mars will receive the sinister trine form Mercury; if Mercury is the significator, then he will form a sinister trine to Mars. The applying planet tells who is initiation or moving into the event.

A sinister aspect is a left-handed aspect. A dexter aspect is right-handed. To keep difference in what is left and right, think of it in point of the Sun facing the Earth - and which side then lies to the Suns left and right. The left side lies ahead of the Sun in an earlier sign in consideration of the flow of the zodiac. The natural motion of the planets is with the zodiac and facing Earth (not with their backs turned as the inferior planets appear during their inferior conjunction with the Sun). So a sinister aspect is the tightening of celestial muscles and delivery of a punch from the celestial left; a dexter aspect from the celestial right.

Dexter

When an aspect is dexter is just like a right-hand punch; full of force and major impact. The action is clear and deliberate, making an obvious case. The marks are there. Whatever the aspects signifies will be evident in a most determined, decisive and pronounced manner. With the dexter aspect there is both intent and delivery.

Sinister

A sinister aspect is like a left-foot kick at goal. It is weaker and with reduced force. The significator has less command of the situation and the ball may not meet its target. The querent could be in the dark and unaware the state of affairs. Sinister aspects do not always live up to expectations. The outcome depends upon a matter of touch. Parties may lack concentration and accident brings about the outfall. However, sometimes the event will creep up and spring into the open through the agency of an unexpected turn. Left foot kicks take you by surprise. The nature of the planets involved must be studied to determine whether the effects will be good or bad. Perhaps the sinister aspect indicates a risk or gamble, or matters are approached from either the wrong or least likely angle. On a statistical basis there is less likelihood of their effects working out.

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