The Flag of Earth has flown - and is flying - over many observatories. The Flag also hangs in the offices of academics, scientists, ham radio operators, and in homes around the world.
Homer, Illinois, home of James Cadle
Big Ear (OSU Radio Observatory)
Columbus Optical SETI Observatory (COSETI)
Parkes (Australian National Radio Observatory)
International Academy of Astronautics - SETI Permanent Study Group
Second Life at the Space Frontier Island
The North American Astrophysical Observatory (NAAPO)