Avebury Halos

Ice halo images by Andrew Collins at the Avebury prehistoric stone circle, Wiltshire, England  November 16, 2010.

A 22° halo circles the low sun. To the left is a faint sundog from plate crystals and at top horizontal column crystals form an upper tangent arc.
  
©Andrew Collins, shown with permission.
Atmospheric
Optics

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Avebury is a huge Neolithic site with a henge, stone circles, avenues and barrows. The whole area was occupied 4000 to 3500 BC by a prosperous and stable agrarian society who built Avebury and several other monuments including nearby Stonehenge.

Non halo images ©Google & Getmapping plc