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The petroglyph panel in the White Tank Mountains west of Phoenix consists of several figures pecked into the dark desert varnish, a patina of iron and manganese oxides that often coats rock in arid environments.
The most prominent figures are an eight-point star and an irregular circle, from which several rays, or arms, protrude.
According to Barentine, the star represents the great supernova of 1006 and the irregular circle, with arms and perhaps eyes, is the constellation Scorpius. Other figures on the rock may represent nearby star patterns.