Observation Planning… What is there to see?
January 26, 2024There are countless (thousands, 10s of thousands, millions, billions) objects in the night sky. There are many object catalogs (NGC, Messier, IC, Caldwell, Barnard, LBN, PGC, UGC, Abell, etc…). Not all of these objects and catalogs are available in every planetarium program,…