Pease 1
Pease 1 is a planetary nebula located within the globular cluster M15 33,600 light-years away in the constellation Pegasus. It was the first planetary nebula known to exist within a globular cluster when it was discovered in 1928 by Francis G. Pease, and just two more have been found since. At magnitude 15.5, it requires telescopes with an aperture of at least to be detected.