... 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 . The bright reflecting triangle is clearly visible on the right of the above horizontally-compressed image taken just after sunset from Namibia in the southern hemisphere in 2009 June. ...