The "13 moons" petroglyphs located somewhere outside the edge of the Sierra Nevada range.  

Although this is known as 13 moons, ostensibly depicting the 13 moon cycles of the year, this may actually be 11.  Curiously, it appears two of the moons have appendages attached to them, so they may be bodies of something.  The lower left moon appears to be the head of the prevalent "platypus"-like head found, and another with appendages facing both up and down, siamese.  Also, far left are 11 smaller moons arranged in an specific order of unknown reason.

Two pairs of the moons are connected together with a red paint line (the color not visible with artificial lighting).  

In the photo art, the Milky Way core is a spring-time rising, with Scorpius in the far right horizon.  Antares shines in the middle of the Scorpius constellation.

This is my first true astrophotography shot that I feel worth putting up.  I have yet to print myself, but I'm sure 16x24 or 24x36 would look great glossy with acrylic.