2 min read
The Bortle scale is a system created by John Bortle to measure and categorise sky darkness. He is an amateur...
theory
4 min read
Harmonic or strain-wave gears have become very popular in the last few years. What is so catchy to attract people...
3 min read
What is light pollution? Light pollution refers to the excessive, misdirected, or obstructive use of artificial outdoor lighting. It's essentially "wasted light"...
