Deep-Sky Companions: The Secret Deep

In this fresh list, Stephen James O''Meara presents 109 new objects for stargazers to observe. The Secret Deep list contains many exceptional objects, including a planetary nebula whose last thermal pulse produced a circumstellar shell similar to the one expected in the final days of our Sun''s life; a piece of the only supernova remnant known visible to the unaided eye; the flattest galaxy known;...