Those of us who live in the southern U.S. have an excellent
view of M22 in the southern sky. Though globular cluster M13 gets top billing in the U.S., M22 is significantly bigger
in apparent diameter. It's therefore more impressive in small telescopes, being easier to resolve into individual
stars. Only two other globulars outshine M22, both far to the south (Omega Centauri and 47 Tucanae).
M22 is believed to contain half a million stars. It's located
toward the center of our Milky Way galaxy, so there is a lot of intervening dust. It is believed that M22 would
be five times brighter otherwise (imagine that!). Nevertheless it's visible to the naked eye under dark skies far
south. Of course at my house I can't see globulars very well even in the telescope. But CCD cameras are wonderful,
and the photo below came out nice.