sandra aka margarete ~

Ano Internacional da Astronomia 2009

O Ano Internacional da Astronomia 2009 (AIA2009) será uma celebração global da astronomia e da sua contribuição para a sociedade e para a cultura, estimulando o interesse a nível mundial não só na astronomia, mas na ciência em geral, com particular incidência nos jovens.
Suspension Bridge Solargraph
Credit & Copyright: Justin Quinnell
Explanation: If every picture tells a story, this one might make a novel. The six month long exposure compresses the time from December 17, 2007 to June 21, 2008 into a single point of view. Dubbed a solargraph, the remarkable image was recorded with a simple pinhole camera made from a drink can lined with a piece of photographic paper. The Clifton Suspension BridgeAvon River Gorge in Bristol, UK emerges from the foreground, but rising and setting each day the Sun arcs overhead, tracing a glowing path through the sky. Cloud cover causes dark gaps in the daily Sun trails. In December, the Sun trails begin lower down and are short, corresponding to a time near the northern hemisphere's winter solstice date. They grow longer and climb higher in the sky as the June 21st summer solstice approaches.

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