Ra = Sun?

[βαθμιαίος]

Galaxy = Logos
Sun = Sub-Logos
Planet = Sub-Sub-Logos
Human = Sub-Sub-Sub-Logos

Ra said that the planet was considered part of the Logos (or Sub-Logos -- it wasn't always clear whether they were talking about "major galaxies" or galaxies or planetary systems). My guess is that they meant that planets were considered part of their parent sun. So I would redo your schema slightly:
Galaxy = Logos
Sun and Planets = Sub-Logos
Human = Sub-Sub-Logos

If anyone's interested I can find the relevant quotes.

As to our sun, I think Sub-Logi and above are exempt from the densities.

I agree.