"Ring of Fire Sequence" by Jia Hao of Singapore was "highly commended" in the Our Solar System category. This composite image shows the progress of an annular solar eclipse in May 2013. Annular eclipses occur when the moon passes precisely over the sun, at a point in the moon's orbit when its angular size is not great enough to cover the sun's disk completely. The result is the "ring of fire" effect you see here. Close to the horizon, the distorting effects of Earth’s atmosphere can also be seen.