Solstice to Equinox Cubed

Astronomy Picture of the Day · 2016-03-26 · NASA (public domain)

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Solstice to Equinox Cubed — APOD for 2016-03-26

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.

Astronomy Picture of the Day for 2016-03-26 — image & explanation courtesy of NASA (public domain), mirrored at Tukuk-OS for reading and search convenience.

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