Light Pillars

Columns of light apparently beaming directly upwards from unshielded (and wastefully polluting) lights are sometimes visible during very cold weather. Plate shaped ice crystals, normally only present in high clouds, float in the air close to the ground and their horizontal facets reflect light back downwards.

The pillars are not physically over the lights or anywhere else in space for that matter ~ like all halos they are purely the collected light beams from all the millions of crystals which just happen to be reflecting light towards your eyes or camera.
Artificial light pillars can be much taller than their natural counterparts because rays from the lights are not parallel and plate crystals with small tilts can still reflect them downwards. The crystals producing the pillars are roughly halfway between you and the lights.

When ice crystals float in the air around you, pillars (and other halos) can even be seen around streetlights a few metres away.

source : http://www.atoptics.co.uk/halo/lpil.htm

My Holiday

I spent my last holiday mostly with my family and my friends. It was simple and fun.
on 22nd of December 2013, I celebrated christmas with my friends from SMAN 3 Bandunf. It was so fun! on 25th of December, I became a morning person.. hehehe. Because of Christmas! I and my family went to church and had dinner together.
During the holiday, I also learned how to cook, cleaned up my room and play with my brother and my dog. i and my brother taught our dog to shake hand and brought him for a walk everyday. Then, on 1st of January, i and my family went to church to celebrate new year. after that we went to buy some food and ice cream! We had such a nice lunch.
It's all about my holiday. It may be simple but it's so meaningful beacuse I spent it with people I love :-)

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