James Cadle's Flag of Earth

In May 1970, James W. Cadle, a farmer from Homer, Illinois, proposed his version of the flag of Earth, that consisted of a blue circle representing the Earth, placed in the centre of the flag, in front of a segment of a larger yellow circle, representing the Sun, placed on the left side of the flag, and a smaller white circle, representing the Moon, located in the right bottom corner of the flag, with everything placed on a black background. It gained popularity among the SETI researchers and is flown at numerous SETI research facilities around the world. Notably, the flag flies at the Ohio State University Radio Observatory, in Delaware, Ohio.[5] On 23 December 1996, in honour of the death of Carl Sagan, three days prior, the flag had been flown there at the half-mast. The flag was originally distributed by Earth Flag Co. International, which was founded by Cadle. The design had entered the public domain in 2003. Following Cadle's death, the flag distribution is being continued by North American Astrophysical Observatory.