Zodiacal Light Over Namibia . ... Credit Copyright: Rudi Dobesberger ( Sternfreunde Steyr ) Explanation: An unusual triangle of light is visible this time of year just before dawn, in the northern hemisphere. Once considered a false dawn , this triangle of light is actually zodiacal light , light reflected from interplanetary dust particles . ... Zodiacal light is also bright for people in Earth's northern hemisphere in March and April just after sunset. ...