Vigilant Citizen (VC) has published an article about the late David Bowie on his website[i] and in it, he in turn quotes from Manly P. Hall, when asserting that the name of Bowie’s final album, Blackstar, was a reference to his (Bowie’s) occult studies.
VC says, “The name of the album itself, Blackstar, refers to an important occult concept: the Midnight Sun,” before going on to quote thus from Manly P Hall:.
    “Apuleius said when describing his initiation (vide ante): “At midnight I saw the sun shining with a splendid light.” The midnight sun was also part of the mystery of alchemy. It symbolized the spirit in man shining through the darkness of his human organisms. It also referred to the spiritual sun in the solar system, which the mystic could see as well at midnight as at high noon, the material earth being powerless to obstruct the rays of this Divine orb. The mysterious lights which illuminated the temples of the Egyptian Mysteries during the nocturnal hours were said by some to be reflections of the spiritual sun gathered by the magical powers of the priests. The weird light seen ten miles below the surface of the earth by I-AM-THE-MAN in that remarkable Masonic allegory Etidorhpa (Aphrodite spelt backward) may well refer to the mysterious midnight sun of the ancient rites.”
    – Manly P. Hall, The Secret Teachings of All Ages

I have looked at the relevant part of Manly P Hall’s book and, interestingly, he goes on to write in the same chapter, on the subject of the Sun’s colour:
“According to esoteric philosophy, blue is the true and sacred colour of the Sun. The apparent orange-yellow shade of this orb is the result of its rays being immersed in the substances of the illusionary world.” He adds that this is why certain gods in India are depicted with blue skin
.
I, like many others of my age-group, drew a lot of inspiration and enjoyment from David Bowie’s works, and Blackstar is indeed a fitting finale from him!

Credit Source for Image Featured At Top of Page
Courtesy of Blackstar music video clip on Youtube: https://www.youtube.com/watch?v=kszLwBaC4Sw

FOOTNOTES:


[i] http://vigilantcitizen.com/musicbusiness/occult-universe-david-bowie-meaning-blackstar/