This seven pointed star is the symbol chosen by Aleister Crowley to symbolize
Babalon, the Thelemic Goddess who is the personification of
the kabbalistic sphere of Binah. The seven points are the seven letters of the
name babalon, the seven planets, the seven "veils," and the seven
chakras.
Freida Harris'
image of Babalon for Crowley's Thoth Tarot:
A traditional image
of Babylon the Great, by William Blake: