Zodiacal Light and the False Dawn . ... Credit Copyright: Night Sky Live Project , CONCAM , NSF Explanation: An unusual triangle of light will be particularly bright near the eastern horizon before sunrise during the next two months for observers in Earth's northern hemisphere. Once considered a false dawn , this triangle of light is actually Zodiacal Light , light reflected from interplanetary dust particles . ... NASA Web Site Statements, Warnings, and Disclaimers . ...