Want to watch a sundial in action? Professor Woodruff Sullivan and Ian Smith at the University of Washington in Seattle have just launched an active webcam of the University’s large vertical declining sundial on the side of the Physics and Astronomy building. The webcam image is updated once per minute day and night. “we know that some of you will want to stare at it for hours on end (or at least bookmark it….”
Their website has many features including the first two time-lapse movies of the giant sundial showing the all-day shadow on the summer solstice and on the autumn equinox. More time lapse videos will be presented during the months that come. In the near future they will improve the present camera with higher-resolution and greater reliability.
A flurry of sundial webcams existed in 2004-05 when the EarthDial Project, the invention of Bill Nye and Woody Sullivan, was run under the auspices of The Planetary Society. The Project, with a motto Two Worlds, One Sun was run in conjunction with the MarsDial Project, which involved the Mars Exploration Rovers Spirit and Opportunity, each of which landed on Mars in 2004 with a small calibration target turned into a Mars sundial on its deck. People around the world were urged to build sundials of a standard design and display them to the world using a webcam. Click Here to See Time Lapse Movies of Some of These Dials. A new Mars sundial will arrive red at the red planet next August onboard Curiosity.
Take a look at the new webcam at http://sunny.astro.washington.edu
[photo credit: Port Macquarie Historical Society]
[photo credit: Port Macquarie Historical Society]
The words “sundial” and “convict” are not often used in the same context, but that is the situation in Port Macquarie, Australia when a vintage sundial made around 1840 was put on permanent display at the Port Macquarie Historical Museum. The dial was made by colonial engraver Raphael Clint and was once owned by Danial Cohen, who, convicted in 1830 of receiving stolen property in Lancaster, was sent to Port Macquarie, a penal colony at the time.
Read more about the history of this dial at: http://www.portnews.com.au/news/local/news/general/sundial-link-to-past/2361551.aspx
What’s worth more than £150,000? An hour horary quadrant dating to 1396 with the personal seal of Richard II. It is up for auction at Bonham. The quadrant, owned by Christopher Becker in Australia, spent the last twenty years in a bag of pipe fittings. An ancestor of Becker apparently came across the quadrant 150 years ago somewhere in Northern England before its final resting spot in Australia.
This quadrant divides the day into 24 equal hours. With a plumb-line attached to one of its corners, pointing the quadrant towards the sun allows the time to be read at the intersection of the plumb line and one of the engraved scales. On its reverse, the quadrant shows a badge depicting a stag lying down wearing a coronet around its throat, symbols associated with Richard II.
The oldest European astrolabe dated 1326 is credited to being used by Chaucer (1342-1400) and resides in the British Museum.
[photo courtesy of NASA]
“Two Worlds One Sun” lives on as the Mars Science Lander called Curiosity makes its way to Mars, once again carrying a camera color calibration target that will be used as a sundial. The original Mars sundial was the idea of Bill Nye, the Science Guy, and designed by Professor Woody Sullivan of University of Washington.
The spacecraft was launched toward Mars on 26 Nov 2011. Onboard Curiosity the camera calibration sundial has four edges each containing a panel of text and image, written by Jim Bell, planetary scientist from Arizona State University and the Mars Exploration Rover team with graphics designed by artist Jon Lomberg.
Second-grade students at Connetquot Elementary School in Islip, New York, created sundials using paper plates and pencils. The pencil gnomons were set mostly vertical by the students and then they traced the resulting shadows at three times during the day. This helped teachers Leslie Davis and Melissa Love demonstrate the sun’s apparent movement in the sky and talk about the earth's rotation as the cause. "The students really had fun," said Love, "and they were able to recognize that a sundial is a tool that can be used to measure time."
A great loss has hit our gnomonic community in Italy. Our friend Giacomo Agnelli died about a week ago. Giacomo was one of the great gnomonists of the past. He had written dozens of articles in engineering and horology, also dealing with mechatronics [mechanical] sundials. He had worked at the European space project, and had frequent ...articles for our magazines [on] gnomonics. He had participated in all meetings of horology in Italy and was known for his satirical cartoons and gnomonic caricatures ...
Nicola Severino Visit A Tribute to Giacomo Agnelli
[photo courtesy of John Carmichael]
The restored Sun City dial re-dedication ceremony held October 7th, 2011 was a huge success. The sundial originally schedule for demolition is proudly located at The Sundial Recreation Center located at 14801N. 103rd Avenue, Sun City, AZ 85351.