Equinox 2013 (astronomy Spring architecture ). Photo by Brillig

Equinox 2013

Uploaded by: Brillig

Wednesday March 20, 2013

Austin, TX (Current Weather Conditions)

Caption: Every night a troll sitting in the middle of a device manipulates it by moving one tile on each platform, solving a Towers of Hanoi puzzle. Five times a year, including the spring equinox, a puzzle is solved. On the spring equinox, the sun aligns with the northern edges of the tiles. Today is such a day. More information at http://victorengel.com/trollcalendar/

EXIF Data

Manufacturer: Apple

Model: iPad

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y-Resolution: 72.00

Resolution Unit: Inch

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YCbCr Positioning: centered

Exposure Time: 1/3367 sec.

FNumber: f/2.4

Exposure Program: Normal program

ISO Speed Ratings: 50

Exif Version: Exif Version 2.21

Components Configuration: - - - Y

Shutter speed: 11.72 EV (APEX: 58, 1/3367 sec.)

Aperture: 2.53 EV (f/2.4)

Brightness: 10.99 EV (6981.50 cd/m^2)

Metering Mode: Pattern

Flash: No flash function.

Focal Length: 4.3 mm

Subject Area: Within rectangle (width 699, height 696) around (x,y) = (1295,967)

FlashPixVersion: FlashPix Version 1.0

Color Space: sRGB

PixelXDimension: 1824

PixelYDimension: 1744

Sensing Method: One-chip color area sensor

Exposure Mode: Auto exposure

White Balance: Auto white balance

Focal Length In 35mm Film: 35

Scene Capture Type: Standard

March 20, 2013 Photo Series

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