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...

This is the diffuse luminance of the night sky. It involves any scattered light seen at night, including natural ones like starlight,...

Gegenschein or counterglow is a faint bright spot in the night sky centred at the antisolar point, ie. the abstract point on the...

The zodiacal band is zodiacal light extending along the whole ecliptic. It is thought to be caused by the reflection of the sunlight from...

Only a few generations ago everyone could look up and see thousands of stars, now many of us cannot. This is because of light pollution....