
M13 was discovered by Edmond Halley in 1714 and has an apparent magnitude of 5.8. Composed of several hundred thousand stars, its diameter is about 145 light-years, and is 25,100 light-years away from Earth. The Arecibo message of 1974 was transmitted toward this globular cluster. The reason was that with a higher star density the chances of a life harboring planet, with intelligent life forms, were higher. We should get a reply in about 50,160 years give or take...
SBIG ST2000XCM, Stellarvue SV-105, Maui Coffee Co. "Kona Blend", 45 15" exposures taken May 29th to 30th at Two Goats Observatory (my driveway).