The Light aspect:

Ruling Planet: Ketu  

Meaning of Crown Chakra (Sahasrara): Dwelling place (without support).

Location: The Crown Chakra is located at the top of the head.  

Plane: Truth/reality. 

Aspect: Self-Realization.  

The Shadow Aspect:

The shadow aspects of the Crown chakra is being disconnected from reality and or spiritual bypassing.  The remedy for this shadow is being in the present moment and facing your  reality.  

 I have included Crown Chakra meditation video.