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by bobhyatt
Mon Jan 12, 2009 2:08 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Unusual Light Pillars Over Latvia (2009 Jan 12)
Replies: 176
Views: 191322

Re: Unusual Light Pillars Over Latvia (2009 January 12)

Perhaps the temperature of the atmosphere at different elevations causes the ice crystals to be very well aligned (i.e. horizontal) near the ground where the air is coldest and most stable, creating narrow light columns, and less well-aligned at higher elevations where the air is warmer and more tur...