World Record, Light and Time

World’s Largest Sundial

First searched for on 11^th January 2004 and as at today, 24^th February 2014 there is still not an entry in the Guinness World Records for this topic, though as mentioned elsewhere in this blog the answer to "what is the world's largest sundial" will almost certainly be the Sundial Bridge, Turtle Bay, California, USA.

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World's Most Expensive Sundial / Sundials on Mars

Yes, there are sundials on the 3rd planet in our solar system the red planet - Mars.
No, they have not been found there but sent there mounted on the Mars Rovers that NASA landed on Mars in March 2012
Also sometimes referred to as the World's most expensive sundial.
A nice claim but is this so actually the case?

The sundial itself is a fairly simple device and not an expensive item but if its delivery and ongoing operation as a part of the Mars Surveyor mission are included in the cost then yes it could be classed as the most expensive sundial.

The ball is the nodus, the post is the gnomon. The cameras on board are able to use the colors on the corners for calibrating colors, and the inner circles for greyscale. There is a mirrored section on the middle circle to reflect the sky.

Bill Nye's Sundial on Mars

There are many articles about the topic on the Internet - here are just a few of them.

• Bill Nye - Sending a Sundial to Mars
• Curiosity's Martian Sundial
• Martian Sundial - A New "Curiosity"
• NASA - Pancam Calibration Targets
• Wikipedia: MarsDial

Europe’s Largest Sundial

According to the link Sutton-in-Ashfield, this is the largest sundial in Europe in Portland Square, Sutton, England.

Europe's Highest Sundial

Found at Guderup, Denmark it is 28 meters in diameter and can sometimes be accurately read to within 2 minutes, The clock is 12 meters high and thus Europe's highest. Around it is located a circular bench because the clock is almost located at the old herredsting place where the "wise men" sat in a circle and took key decisions.