Konrad wrote:
Federer is a good case. Venus doesn't describe his profession, and you would expect that she would if Sidereal Taurus was ruled by Venus. However, Mercury rules both Spirit and the 10th sign while casting his ray into the sign. He is also the bound lord of both. Tennis seems very Mercurial to me.
Taurus is the sidereal sign on the 10th cusp. Thus Venus is the focal point of profession or reputation.
Venus is angular in the 1st house suggesting a prominent profession noted by others.
Venus receives the 4 degree aspect from Mars in Gemini (tennis).
Venus is also the 3rd house lord (hands and arms).
Venus is the only strongly angular planet in Roger Federer's chart. Thus, as a receptor point for aspects it's extremely important.
Then we can extend the symbolism if we wish. The Sun disposits Venus and is in the 12th with quick moving Mercury. (12th is the house of the feet.) Then we continue the flow of energy from Mercury-Sun: Dispositor Moon is in the 3rd. So there is a link between the 3rd and the 12th. (Body part symbolism only, feet and arms used in tennis.) Oh, and Mars in Gemini is trine the 3rd house Moon.
Federer's chart is a very good example of the gestalt of the astrological chart. But without the life history of a person astrologers probably wouldn't know which of the many attributes of the planets to apply in a reading.
You wrote: "Tennis seems very Mercurial to me." Mercury rules many things, but in this case Mercury isn't directly connected to either the 3rd of the 10th in the sidereal zodiac.
You say that Mercury rules the 10th sign. Is this in your own unique system, or are you referencing the tropical zodiac?
House lords as such don't necessarily describe affairs of a house. But they are receptor points for aspects, and of course their position in the circle as measured from the ascendant is critical.
There was a comment in this thread that Aldebaran was related to kingship. Federer's nonagesimal point (highest point of the ecliptic 90 degrees from the ascendant) is 17Tau31. Aldebaran is at 16 Taurus (Krisnamurti)...tennis "kingship." (I've been experimenting with fixed star positions at the nonagesimal point.)