Comets
http://www.skyandtelescope.com/observing/objects/comets/News, estimating brightness, photography, reporting discoveries, and articles.
Submitted in section: Astronomy: Amateur: Solar System Observing: Comets: Comets
News, estimating brightness, photography, reporting discoveries, and articles.
Submitted in section: Astronomy: Amateur: Solar System Observing: Comets: Comets