Category
page 1Amateur astronomy
amateur astronomy
hobby whose participants enjoy watching the sky
Bortle Dark-Sky Scale
scale of night sky brightness
Sky & Telescope
scientific journal
Sidewalk astronomy
Messier marathon
astronomy competition
amateur telescope making
activity of building telescopes as a hobby
Astronomy
American magazine
Foucault knife-edge test
optical test for curved mirrors
Antoniadi scale
weather conditions categorization system
Israeli Astronomical Association
Cherry Springs State Park
state park in the US
Edgar Wilson Award
American annual award for amateur astronomers involved in identifying comets (1998-)
public observatory
astronomical observatory mainly dedicated to public and educational purposes
LRGB
thumb|LRGB Photo of the Eagle Nebula.
LRGB, short for Luminance, Red, Green and Blue, is a photographic technique used in amateur astronomy for producing good quality color photographs by combining a high-quality black-and-white image with a lower-quality color image.thumb|left|Deep View of the Large and Small Magellanic Clouds captured using the LRGB method.In astrophotography, it is easier and cheaper to obtain good quality, high signal-to-noise ratio images in black and white. The LRGB method is used to work around this to get good color images. The color (chrominance) information from the