Messier 13 (M13), also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster, is a globular cluster of about 300,000 stars in the constellation of Hercules. M13 is about 145 light-years in diameter, and it is composed of about 300,000 stars. M13 is 25,100 light-years away from Earth. The Arecibo message of 1974, containing encoded information about the human race, DNA, atomic numbers, Earth’s position, and other information, was beamed towards M13 to allow it to be picked up by potential extraterrestrial civilizations in the cluster. The message will reach the cluster in 25,000 years.
I took this image originally in 2016 in LRGB (27 (of 10 min) ,9,9,9 (of 5 min each) total exposure 405 minutes using QSI 683 with a 10″ AG Optical iDK on Paramount MX.
However, in 2022, I added more data and then combined everything to come up with a much sharper image.