Dear George,
I can tell you what I do know about the pyramids near Cairo, and their relationship to stars. But I am not an expert on Egypt, so I am not aware of a solar connection, but perhaps someone else in this discussion Forum can chime in. What I know is that the Great Pyramid has a shaft that was designed so that the star Sirius can shine down the shaft and illuminate the face of the buried Pharao. Isn't that amazing?
Isabel Hawkins