Mysterious artifact from Indonesia

In 1992, during the exploration of the cave located in the Mount of Satan in Kapan (Indonesia), two mysterious stones were discovered, joined together and covered with striking engraving in the form of a solar system.

If we look at the image, we can see a drawing that was transmitted by the spacecraft Pioneer 10, launched in 1972.

As we see, on the stone is engraved with the image of the solar system, the planets that make up its composition, the sun, as well as two people: men with a raised hand and women.

Surprisingly, this artifact is thousands of years old and we can only guess who in those distant times could create this object, and most importantly – why? Perhaps this is a star map of any newcomers, or maybe a part of some library of developed civilization that was long before ours.