Circle in Germany. July 30, 2012

Here is his picture

 But I use to decrypt itself is not a circle, and his detailed scheme

A wheel with blades of unknown purpose.  12 blades, 468  marks on the rim of the wheel. You can guess that the label - it is months. 468 months = 39 years. 39 years ago was 1973.

The blades are very similar to young children's boats. August 9, 2012 marks exactly 39 years since the nightmare that saw the space shuttle astronauts, "Skylab-2". This article is about the events in Russian

http://www.anvorobyov2008.narod.ru/1973god.htm

Of course, in terms of super-civilization of any spaceship earth - is a children's boat.