What's New Under The Sun
Frans Maes Received a Royal Decoration
Monday, 24 March 2025 21:33
Several years ago Frans decided to write the course on sundials that included self assessment questions to force students not only to read the text, but to internalize the concepts. And a final submittal question "not necessarily a difficult question, but: no answer, no new lesson." Thus Frans Maes began writing lessons and sending them out to students.
NASS has now used his material to create...
Pros and Cons of Daylight Savings Time
Monday, 24 March 2025 15:37
In a 24 March 2025 article from the on-line Science Advisor (American Association for the Advancement of Science) Phie Jacobs summarizes the "great debate" of the yearly shift from standard time to daylight savings time. In January 2025 the US Senate introduced the Sunshine Protection Act to permanently have daylight savings time year round. Certainly 54% of Americans do not like the...
Native American Moon Alignment Ring
Friday, 21 March 2025 19:26
Perhaps the most famous alignment circle in the United States is the Cahokia Woodhenge near St. Louis constructed between 700-1400 CE by Cahokia Indigenous native Americans. But there were an estimated 10,000 other earthen mounds that once were scatter across the mid-west..
In an article from Atlas Obscura (https://www.atlasobscura.com/articles/octagon-earthworks-ohio) by Olivia Young on March...
Hamilton Dial under Restoration
Friday, 21 March 2025 18:37
The Hamilton dial is in the restorative care of Jarrett and Celene Hawkins (Hawkins & Hawkins Custom, LLC in Cincinnati Ohio https://www.studio-hawkins.com/) in preparation for the dial's dedication on Saturday, May 31, 2025.
The face of the Hamilton Grand Army of the Republic (GAR) sundial has been cleaned and bead-blasted showing the dial as it was cast 84 years ago. In the process,...
Register for the 2025 NASS Conference
Tuesday, 11 February 2025 00:27
We will celebrate our 30th annual NASS Sundial Conference in Ottawa, Ontario 7-10 August 2025. But you need to register by April 15th to get theFull and Partial attendee rates at a discount. We will be staying at Le Germain Hotel Ottawa, 30 Daly Avenue, Ottawa ON Canada. We have a block of rooms at a discount daily room rate of 284 CAD (approx. 216 USD) plus HST and MAT taxes. ...
VSSC Space Museum gets Polar Sundial
Tuesday, 17 December 2024 23:47
In November 2024, a team consisting of members from SPL, TTDG and CMD of VSSC successfully designed and installed an accurate and fully functional sundial at the Rocket Garden of VSSC Space Museum, Thumba (8.53°N, 76.86°E). Following a space theme, the vertical gnomon is a 3-stage rocket that casts its daily and seasonal shadow on a dial face 1 1/2 meters by 1 meter. The the sundial face...
Historic Sundials of Andalusia
Saturday, 16 November 2024 00:07
Esteban Martínez Almirón has published a new book Historical Sundials: Forgotten Andalusian Treasures (Relojes de Sol Históricos Tesoros Andaluces Olvidados) In it he reviews over 400 sundials from the Andalucian region of southern Spain Originally to celebrate the 25th year of the website https://relojandalusi.org/
Esteban Martínez Almirón began showing his sundial drawings on the site....
Shelbyville Sundial
Wednesday, 13 November 2024 19:36
It isn't often that a sundial face is created before the gnomon is attached. In Shelbyville IN a large, circular art piece in the form of a sundial, was created at the Blue River Trailhead early in 2024. If they had chosen an analemmatic sundial, a walker of the trail could have simply stood on the appropriate date and used his or her own shadow to tell the local solar time. ...
Sun Tower Competed
Monday, 04 November 2024 18:38
The Sun Tower's shadow marks the passing of the seasons
credit Jonathan Leijonhufvud
For two years News Atlas (https://newatlas.com/architecture/) has reported on the progress of the construction of the Sun Tower in Yantai, China. The 164-foot (50m) curved conical tower was designed by OPEN Architecture symbolized the watch towers of the Ming dynasty (1368 to 1644 CE)...
Hamilton Dial Restoration
Monday, 04 November 2024 17:30
NASS Registered Sundial #1109 at https://sundials.org/index.php/sundial-registry/onedial/1109 is one of a series of bronze sundials presented by Daughters of Union Veterans of the Civil War, dedicated to the memory of the Grand Army of the Republic. Unfortunately the dial in Hamilton, Ohio, suffers from neglect and the gnomon has long been missing.
With support, this dial has been designated...
Canadian Sundial Coin
Thursday, 10 October 2024 17:56
Photo of the Canadian $20 Silver Coin with the reverse as a Sundial. Photo courtesy of the Royal Canadian Mint. Sundial design by Anna Bucciarelli.
The Canadian Royal Mint will release a fully functioning sundial coin expected to ship on 12 December, 2024. The obverse is a profile of His Majesty, Charles III (designed by Steve Rosati) and the reverse is a...
NASS Sundial Class
Monday, 07 October 2024 03:03
Once again NASS presents Elements of Dialing, a twelve week course covering the basics of sundials, led by Steve Lelievre. The course covers basic principles of how sundials work, calculations involved in designing sundials, types of time (systems of time measurement), and some of the history of sundials.The course is intended for people who are new to sundialing and who wish to learn some of...
VLA Sundial Memorial
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 Bracewell Memorial Sundial at VLA
Photo Credit: NRAO/AUI/NSF
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In 1961 Professor Ronald Bracewell at Stanford University created an X shaped array (called a “Chris-Cross array” for W.R. “Chris” Christiansen) using 32 10-foot diameter dish antennas to form a radio spectroheliograph nestled in the hills of Palo Alto, California.
 Ron_Bracewell_Radio_Sundial_Brochure.pdf | [ ] | 1780 kB |
9/11 Timeless Sundial Dedicated In Hampton, N.J.
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Tom Carpenter, a member of the Hampton fire company for 44 years, presented plans for a 9/11 memorial to the Borough Council at the beginning of 2012 and Councilman James Cregar began designing the memorial as a sundial using beams recovered from Ground Zero of the Twin Towers.
9-11 Memorial Sundial Dedicated at Croton Landing
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On September 11, 2012 the Town of Cortlandt and the Villages of Buchanan and Croton-on-Hudson in New York will dedicate a giant sundial as part of a 9-11 memorial using steel salvaged from the World Trade Center site. All are welcome to the dedication.
Visitors attending the dedication of the Buchanan*Cortlandt*Croton-on-Hudson (BCC) 9-11 Remembrance Memorial are asked to assemble at 2:30 pm at the Croton Landing parking lot and walk the 1/2 mile to the memorial site for the 3 o’clock ceremony. A van will be available for those who wish to ride. For further information, please call the Project Director, Janet Mainiero at 914-271-8222.
| 769_10_Gazette_Newspaper_Article_Dial_Dedication.pdf | [ ] | 883 kB |
| 769_10_The_Gazette_Article_on_Dial_Dedication.pdf | [ ] | 883 kB |
| 769_11_Details_of_Nine_Dial_Medallions.pdf | [ ] | 107 kB |
| 769_11_Nine_Dial_Medallions.pdf | [ ] | 107 kB |
| 769_12_Architect_Site_Elevation_Plan.pdf | [ ] | 66 kB |
| 769_13_Architect_Site_Plan.pdf | [ ] | 553 kB |
| 769_14_Architect_Sundial_Geometry_Plan.pdf | [ ] | 349 kB |
| 769_30_Poem-Reach_Through_The_Shadow.pdf | [ ] | 11 kB |
Read more: 9-11 Memorial Sundial Dedicated at Croton Landing
Fischer Dial Dedicated in New Milford, CT
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[photo courtesy of volunteers at the McCarthy Observatory ]
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On Saturday, June 9th 2012, the volunteers of the John J. McCarthy Observatory in New Milford, CT, dedicated a 9-foot stainless steel sundial as the centerpiece of “Galileo’s Garden” adjacent to the John J. McCarthy Observatory. The sundial was built and dedicated in memory of Kathleen Fischer, a sixth-grade science teacher who inspired many students to pursue science.
The sundial is an open armillary, with an adjustable hour band for standard and daylight time. At the tip of the gnomon is a bronze and brass true-size rendering of Galileo’s first telescope, honoring the 400 years since Galileo explored the heavens. The North American Sundial Society was privileged to donate to this effort.
Hampton to Build 9/11 Memorial Sundial
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Todd Petty reported in the Hunterdon County Democrat that Tom Carpenter, a member of Fire Company 13 for forty-three years, presented plans to the city council for a 9/11 memorial in Veteran’s Park located in Hampton Borough, New Jersey.
The park has memorials honoring local veterans from The Great War to those of the conflicts in Iraq and Afghanistan. During the twin tower collapse of 9/11 Tom Carpenter recalled, “Thank God we didn’t have anyone from Hampton Borough, but Lebanon and Bethlehem did. We did respond to Ground Zero within hours …and spent two days there. Hampton does have a direct connection [to 9/11] and we’re proud of it.”
September 11th Remembrance
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September 11th is a time of remembrance. At Freedom High School in Woodbridge, Virginia stands a large sundial dedicated in 2004 with four inlaid plaques. The plaques are arranged on the ground such that the gnomon shadow tip falls on them at 8:45, 9:03, 9:37 and 10:07 AM, the times of the four air crashes. Near the sundial is a low, black granite panel commemorating the citizens of Prince William County that lost their lives on September 11th, and the names of those citizen are on bricks surrounding the sundial.
Two Worlds - One Beginning
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Everyone is excited about the landing of Perseverance, the Mars rover. If you look closely at the first panorama of the Martian landscape you will see on the equipment bay of Perseverance the Mastcam color calibration target. It sort of looks like it could be a sundial. In 2004 a similar calibration target was used as the first Martian sundial, designed by Dr. Woody Sullivan and Jim Bell with the support of The Planetary Society and Bill Nye, "The Science Guy" [See PDF at bottom]. Is the Mastcam color calibration target a sundial as well? Here is Dr. Sullivan's answer to a group of sundial enthusiasts (2/25/2021):
"The short answer is “No”. The longer answer follows. The new object on Perseverance (officially the "photometry calibration target") has obvious similarities to the Mars dials on Spirit and Opportunity that landed in 2004, and in fact it is a technological and aesthetic “grand-daughter” 17 years later. (The intervening generation is the Curiosity rover, which landed in 2013 and is still alive). The Mars dials that a small group of us designed and fabricated and then occasionally “used” to read Martian time were a great experience for me.
"But after over a decade of Spirit and Opportunity, I decided not to get involved in any future NASA missions — they gobble up a lot of time! The science and fabrication of the new calibration target (as for Curiosity) is led by a group at U. of Copenhagen.
"Nobody has ever done anything with the orientation of the shadows cast by the “gnomon” on Curiosity and I’m sure nobody will for Perseverance either. By the way, independent of gnomonics, the vertical tube has a vital scientific purpose: its shadow on the gray and colored patches allows one to calibrate camera images properly in shadow as well as sunlight.
"The various symbolism and messages on Perseverance also stem directly as heritage from Spirit and Opportunity . You can find a tremendous amount of detail about all aspects of the Perseverance cal target (including construction) at https://mastcamz.asu.edu/mars-in-full-color/ [See PDF at bottom]. The feature I like best is the motto “Two Worlds, One Beginning”, which nicely refers to Spirit and Opportunity ’s “Two Worlds, One Sun” as well as early solar system history and the possibility of early life on Mars. (Curiosity has the terrible motto “To Mars to Explore”.)
"Nevertheless, I watch the procession of missions with great astrobiology interest. And someday I will write up the whole Mars dial experience, including many Martian landscape images in which it appears, and how a student and I were actually able, using its shadow, to measure the Martian analemma at local mean (“clock”) noon over a Martian year ( = 1.9 Earth years).
— Woody Sullivan
Prof. (Emeritus) Woodruff T. Sullivan, III
Dept. of Astronomy & Astrobiology Program Box 351580
University of Washington
Seattle, WA 98195 USA
| Mastcam-Z_Cal_Targets.pdf | [ ] | 6721 kB |
| The Planetary Report-2004-v24n1.pdf | [ ] | 1426 kB |
Planetary Society Brings Back Earth Dial
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The Planetary Society and Bill Nye, The Science Guy, are bringing back the Earth Dial, which is a simple to make gnomonic horizontal sundial reminiscent of the sundial incorporated into the Mars rovers Spirit, Opportunity and now Curiosity. Their original and fundamental purpose is to serve as test patterns for the rover cameras, but they also provide an opportunity as unique shadow casting sundials.
“Since we had shadows being cast on Mars, I suggested it be a sundial… I admit I was quite enthusiastic about it. Steve Squyres, the Principle Investigator on the Spirit and Opportunity missions, made the call, and the Mars Dials were created. He received the [Planetary] Society’s Cosmos medal a few years ago, for his wonderful leadership of the project.”
The Earth Dial project was started in 2004 and now, nearly a decade later, is being brought back. Visit the Planetary Society website Planetary Society - Earth Dial for details and download the attachment below to construct your own Earth Dial.
| EarthDials-2013.pdf | [ ] | 923 kB |
TED Lecture - Sundials to Mars
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Bill Nye, The Science Guy gives a 7 minute TED-ED talk describing the excitement of creating sundials on Mars. http://ed.ted.com/lessons/sending-a-sundial-to-mars-bill-nye
TED stands for Technology, Entertainment, and Design, a nonprofit organization devoted to spreading ideas of worth. Conferences are held each year with more than 50 guest speakers to motivate the audience on many different fields and now through YouTube, you can share the excitement of sundialing.
| MakeYourMarsDial_NyeLabs.pdf | [ ] | 976 kB |
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