FAST - Five hundred meter Aperture Spherical Telescope - Big Chinese Radio Telescope

The Chinese are building a big radio telescope. All anyone seems to be talking about is how they can look for alien civilizations (radio broadcasts) from the other side of the universe. What they don't mention is that it could also be used as a RADAR transmitter. With something this big they should be able to detect a soccer ball a thousand miles away, should anyone put a soccer ball a thousand miles up. Via Robert Scott Ladd.

Artist's rendering of completed reflector.

Satellite view of FAST site. They have made some progress since this photo was taken.
They are installing the triangular reflector panels starting from the center.

Satellite view of Arecibo Radio Observatory in Puerto Rico, done at the same scale as the one in China. You can see that FAST is considerably larger.