Sharing astrononomy information, references, pictures and tools
Web Links Of Value
Web links to Lists And References for Astronomical Objects
- Fantastic site to get pictures of the NGC or IC objects easily.
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.
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.
- Deep images of full sky with object search. Remarkable
: Image search frontend: Powerful and serious image searches
is loaded with current info. Daily condition pictures at
CBAT list from Harvard
with some pictures
Measurements And Calculations Used In Astronomy
- Also see
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
- Sky and Telescope on
by Thierry Legault.
measures magnitude per Arc Second. Learn about
magnitude per ArcSec
Limiting Magnitude Calculator
- Calculate expected limited magnitude for the telescope, sky, observer
- 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