Sep 24, 20233 minWhat is the Bortle Scale?This is a way of measuring the quality (brightness) of the night sky for a given location and it was created and published in 2001 by...
Sep 3, 20231 minWhat is Skyglow?This is the diffuse luminance of the night sky. It involves any scattered light seen at night, including natural ones like starlight,...
Aug 31, 20231 minWhat is Gegenschein? Gegenschein or counterglow is a faint bright spot in the night sky centred at the antisolar point, ie. the abstract point on the...
Aug 29, 20232 minWhat is zodiacal light?The zodiacal band is zodiacal light extending along the whole ecliptic. It is thought to be caused by the reflection of the sunlight from...
Aug 24, 20232 minLight PollutionOnly a few generations ago everyone could look up and see thousands of stars, now many of us cannot. This is because of light pollution....