Deep Sky Companions: The Secret Deep

摘要

In this fresh list, Stephen James O'Meara presents 109 new objects for stargazers to observe.rnThe Secret Deep list contains many exceptional objects, including a piece of the only supernova remnant known to be visible to the unaided eye; the largest edge-on galaxy in the heavens; the brightest quasar; and the companion star to one of the first black hole candidates ever discovered.