Deep-sky observing is easily the most popular field for amateur astronomers. The big problem faced by non-professional observers is what to look at - what is vi
'Deep Sky' refers to the universe beyond our own solar system. Using binoculars or telescopes, any sky-gazer can become a deep sky observer. Deep Sky Observer's
Deep-sky observing is easily the most popular field for amateur astronomers. The big problem faced by non-professional observers is what to look at - what is vi