22˚ Halo

Today I've experienced a new phenomenon: 22˚ Halo. It is an optical phenomenon that occurs because of ice crystal in the atmosphere diffract the moon light. (for more information http://en.wikipedia.org/wiki/Halo_(optical_phenomenon))

The sky is clear tonight after being covered by grey clouds for days. This phenomenon is a brief relief after being stressed by the 332 History paper in the evening.

[Please note that both photographs are edited by iPhoto. My camera is incapable of capturing a high quality image at night.]