Deepsky Observer's Companion
http://www.psychohistorian.org/astronomy/doctutorial.htmlTutorials, chart index, discussions, certificates, and resources.
Submitted in section: Astronomy: Amateur: Deep Sky Observing: Deepsky Observer's Companion
Tutorials, chart index, discussions, certificates, and resources.
Submitted in section: Astronomy: Amateur: Deep Sky Observing: Deepsky Observer's Companion