Images John Montgomery Copyright 2007
Reported
It appears to be made by 'human agencies' after all. A strong feeling that
Update
Pentagram (Wikipedia)
The pentagram has long been associated with the planet Venus, and the worship of the goddess Venus, or her equivalent. It is also associated with Venus as the Morning Star, the bringer of light and knowledge.
Kabbalah
Venus is Netzach on the Tree of Life (read more here ...)
Netzach is also called "Victory," referring to its attributes of perseverence, determination, and endurance. In the archetypal conversation, Netzach is the leader, the dominant. Netzach directs the conversation. Our seeing can be controlled; we can shut our eyes, avert them, or focus them for close inspection. But we hear sounds whether we want to or not. The ability to focus hearing - to listen carefully, a trait everyone could seek to develop.
Mercury is Hod on the Tree of Life (read more here...)
Hod itself is concerned with both inner and outer aspects of communication, which is the communication between the parts of total self and also communication with other 'selves'. Hod is the Sephira of mental magick --- the magick of grimoires and spells; in layman terms the magic of grammar and spelling. Hod is known as 'the perfect intelligence'. Its traditional virtue is that of truthfulness; its vices are falsehood and dishonesty. Associated with Hod are the words, names, verses and spells of traditional magick.