Sharing astrononomy information, references, pictures and tools
Web Links Of Value
Web links to Lists And References for Astronomical Objects
Ngc/IC Project - Fantastic site to get pictures of the NGC or IC objects easily.
Astronomy Basics - Great info page with many key points on getting started and general astronomy
Astronomical League Large number of organized observing projects for ideas or earning cirtificate/pins.
SAC Observing Lists - Saguaro collection of many fine lists and also see their astro links.
Heavens Above Sattelite And Space Station tracking information and astroids/comets as well
Adventures In Deep Space - Advanced collection of astronomical targets and projects for visual observers.
WikiSky - Deep images of full sky with object search. Remarkable
SkyView Query: Image search frontend: Powerful and serious image searches
Solar Activity: SolarHam site is loaded with current info. Daily condition pictures at SolarMonitor
Supernovae Lists: CBAT list from Harvard and from Rochester Astronomy with some pictures
Measurements And Calculations Used In Astronomy
Telescope Formulas - Also see this link for common formulas for visual and astrophotography math.
Star Testing Of Optics - Shows star test patterns that are from excellent to bad showing common problems
Collimation - Sky and Telescope on Newtonian collimation. And SCT collimation by Thierry Legault.
SkyQuality meter measures magnitude per Arc Second. Learn about magnitude per ArcSec
Limiting Magnitude Calculator - Calculate expected limited magnitude for the telescope, sky, observer
Atmospheric Effects - Extinction (loss of magnitude due to atmosphere) and Refraction is explained nicely
Image Scale Calc - Enter telescope and CCD sensor specs and calculate arcSec per Pixelsearchs