Tag: Light Pollution

Local Clear Sky Chart

Apparent Magnitude – What Is It?

Apparent magnitude is something that every beginning and experienced telescope owner has to consider. I sometimes reminisce about my first telescope, an entry-level 115mm reflector. My family let me pick out (but not touch) the scope and assorted accessories well before Christmas, a holiday that rapidly became an eggnog-induced flurry […]

Unihedron SQM-LU-DL

Unihedron SQM-LU-DL

Unihedron SQM-LU-DL: The names Unihedron and  have become synonymous with measurement of sky brightness. Indeed, it’s hard to imagine a Sky Quality Meter tool that has had greater impact on quantification of local light pollution. Unihedron’s original SQM set the standard and has since evolved into a comprehensive range of […]