M22

M22, also known as Messier 22 or NGC 6656, is a globular cluster located in the constellation Sagittarius. It is visible to the unaided eye as a hazy patch of light and was first recorded in 1665.123

Globular clusters are large, old collections of stars packed into a symmetrical, spherical shape. They are the most massive and largest type of star cluster. M22 contains thousands to hundreds of thousands of stars and is composed of old stars, known as Population II objects. These stars are significantly older than those found in our solar neighborhood, with ages estimated between 12 and 16 billion years.31