Abell 39 [SEP] constellation
Abell 39
Abell 39 is a low surface brightness planetary nebula in the constellation of Hercules. It is the 39th entry in George Abell's 1966 Abell Catalog of Planetary Nebulae (and 27th in his 1955 catalog) of 86 old planetary nebulae which either Abell or Albert George Wilson discovered before August 1955 as part of the National Geographic Society - Palomar Observatory Sky Survey. It is estimated to be about 6,800 light-years from earth and 4,600 light-years above the Galactic plane. It is almost perfectly spherical and also one
Abell 2061
Abell 2061 is a galaxy cluster in the constellation of Corona Borealis. On a larger scale still, Abell 2061, along with Abell 2065, Abell 2067, Abell 2079, Abell 2089, and Abell 2092, make up the Corona Borealis Supercluster. It has a northeast southwest orientation and Abell 2067 lies 1.8 megaparsecs north of it.