NGC 6656, also cataloged as Messier 22 (M22), was amoung the first globular clusters to be discovered².  Globular clusters contain some of the oldest stars in our galaxy and are the objects of considerable study and research.  M22 is located in the constellation Sagittarius⁽¹⁾ approximately 10,600 light years distance⁽²⁾.  It is one of the brightest globular clusters observable from northern latitudes⁽²⁾.  The cluster spans about 65 light-years in diameter⁽¹⁾ M22 is one of only four documented globular clusters containing a planetary nebula⁽²⁾.  Recent studies using data collected by the Hubble Space Telescope have identified a number of planet-sized objects moving among the cluster stars^{3}.  The masses of these objects have been determined to be as small as 80 times that of the Earth⁽³⁾.  These "orphan planets" were discovered using a technique so-called microlensing⁽³⁾, i.e. the bending of light of background cluster stars

References
¹NORILab: https://noirlab.edu/public/images/noao-m22/
²Wikipedia: https://en.wikipedia.org/wiki/Messier_22
³Hubblesite: https://hubblesite.org/contents/news-releases/2001/news-2001-20.html <