My own twisty turny witchy path has been influenced very heavily by my interest in astronomy - note astronomy not astrology, I have little patience with star signs I'm afraid - What I am interested in is working with the individual energies and characteristics of the planets and drawing those strengths and powers into the workings that I undertake.
In the beginning I worked primarily with a few planets and moons that I felt comfortable with, predominantly the Earth's moon (as being a witch the moon is heavily linked to my own relationship with the craft) but over time I established very definite personal connections in my mind and I even expanded the collection to include some lesser known celestial bodies like the moons of Uranus and Saturn. I have now moved beyond the solar system with a representation of Proxima Centuri our nearest star in the galaxy. I would imagine that eventually I will expand to include some of the more well known exo planets and pick up some of the missing bodies of our own solar system - I have always felt that the moons of Mars are a bit conspicuous by their absence.
The influence of the Universe energies on my path has been substantial and my workings have become closelvery affiliated with my crystal collection. I use the spheres with some regularity to form a working circle and I notably performed a powerful finding spell recently by calling on the energies of the close orbit between Pluto and its similar sized moon Charon. I often clasp the Earth in my hands when grounding and I've even lent elements of my collection out to others who have needed them. (Husband: I'm feeling a bit down, Me: Hmm, I'll just nip up and stick Saturn under your pillow...) Working with the Universe has given me a powerful source of energy to tap into and a very tangible understanding of what it is to call upon external power. It is perhaps similar to the Wiccan ritual of Drawing down the Moon, but with more scope for diversity of different energies. Predominantly and most importantly for me my crystal solar system has allowed me to develop my path as a witch down a very unique and personal structure that I have been able to design and evolve myself. This independence of thought is one of the most crucial elements of being a solitary witch, I create the path, I don't just follow it.
Image (top) http://www.deviantart.com/art/Solar-System-92938702 (holly66696669)
Other images personal to the Deguwitch's collection