Yesod (coloured violet) - the personal foundation - is in the lower Great triad of Earth.   Daat (union) the transpersonal dimension, is in the upper Great triad of .  the Spirit (blue).  Between them is the solar heart centre of the Tree - Tifareth.   In the planets, Daat corresponds to Pluto and Yesod to the Moon.  In the physical world of our solar system, these are about the same size.
{}