M22 (NGC6656)

Globular cluster in Sagittarius.

M22 is about 10,000 light years away with approximately 70,000 stars - 32 of which are variables. It is 200 light years in diameter and ranked 4th in brightness of all known globular clusters in the galaxy. M22 also boasts a planetary nebula, one of only 4 known in Milky Way clusters.
Center of M22 as observed by the NASA/ESA Hubble Space Telescope.
Planetary nebula in M22 - known as IRAS 18333-2357 or GJJC1

Image credit: Rolf Wahl Olsen.
http://www.pbase.com/rolfolsen/image/136080440/original
Messier 22

messier.seds.org
Messier 22

How to find M22 in the night sky, info on the planet-size objects found within, history of M22

www.universetoday.com