What is magnitude, and how to interpret the value? To answer this question, first, we have to touch on another...
Theory
The Bortle scale is a system created by John Bortle to measure and categorise sky darkness. He is an amateur...
Harmonic or strain-wave gears have become very popular in the last few years. What is so catchy to attract people...
The exposure time is the value (usually expressed in seconds) that indicates how long you would expose a camera sensor...
What is light pollution? Light pollution refers to the excessive, misdirected, or obstructive use of artificial outdoor lighting. It's essentially "wasted light"...