... Once considered a false dawn , this triangle of light is actually Zodiacal Light , light reflected from interplanetary dust particles . ... The band of our Milky Way Galaxy on the left mirrors the zodiacal band. ... Zodiacal light is so bright in the north this time of year because the dust band is oriented nearly vertical at sunrise, so that the thick air near the horizon does not block out relatively bright reflecting dust . ... Publications with keywords: zodiacal light - Milky Way . ...