Statement: On Dec. 11, around 9 a.m., it was quite cold and the sky clear of clouds. However, there was a uniform haze of ice crystals (diamond dust) in the atmosphere creating a beautiful double ice halo around the morning sun. Complete with sun dogs (either side), tangent arc (above) and circumzenithal arc (above that). And me without a camera. For a description of ice halos, see www.spaceweather.com.