Libellés

26.3.16

Imagens do Mundo - Animais - O gato na Exposição

Um gato de raça Fold durante uma exposição em Bishkek (Kirguistán).EE

Imagens do Mundo - Amanhecer em Mallnow, Alemanha.

Amanhecer em Mallnow, Alemanha.

Imagens do Mundo - Barcos à vela em Cagnes Sur Mer - France

Barcos à vela em Cagnes Sur Mer, France.

Imagens do Mundo - Primata em Londres

Primata Hanuman no jardim zoológico de Londres.

Imagens do Mundo - Atardecer em La Habana - Cuba

Atardecer numa rua de La Habana (Cuba).

Astronomy picture of the day - 2016 March 26 - Solstice to Equinox Cubed

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Solstice to Equinox Cubed 
Image Credit & CopyrightOlivér Nagy 
Explanation: This 3 month long exposure packed the days from December 22, 2015 through March 20 into a box. Dubbed a solargraph, the unconventional, unfolded picture was recorded with a pinhole camera made from a cube-shaped container, its sides lined with photographic paper. Fixed to a single spot for the entire exposure, the simple camera recorded the Sun's path through Hungarian skies. Each day a glowing trail was burned into the photosensitive paper. From short and low, to long and high, the trails follow the progression from winter solstice to spring equinox. Of course, dark gaps in the daily sun trails are caused by cloud cover. Sunny days produce the more continuous bright tracks.