What's New Under The Sun
Register Now for NASS 2023 Conference
Monday, 16 January 2023 01:21
The NASS Conference comes early this year. Register now for the 28th annual NASS Conference in Ann Arbor, Michigan June 8-11, 2023
KensingtonHotel, Ann Arbor Michigan
Ann Arbor is best known as the home of the sprawling University of Michigan with its architecture, quadrangles, and bustling student life. Yet, it also boasts of great art, science, and archeological...
New Sundial for Kika Silva Pla Planetarium
Sunday, 18 December 2022 23:00
Sklar Bixby and Jeremy Meel, students at Santa Fe College in Florida took on a project to design and 3D-print a new sundial for the Kika Silva Pla Planetarium in Gainesville Florida (located on Santa Fe's Northwest Campus). Under the guidance of Dr. Philip Pinon, Sklar and Jeremy took on a semester long project as part of the Exploring Honors Mathematics class. They designed a horizontal sundial...
NASS Dialist Don Snyder Passes
Saturday, 10 December 2022 17:41
Don Snyder, long time NASS member, sundial designer and conference organizer, died Nov. 21, 2022 at the age of 87. He organized two St. Louis conferences for NASS in 2008 and 2017. For the first St. Louis conference, Don worked closely with Michael Olsen of the Missouri Botanical Garden to have five sundials available for viewing, including the dedication of a dial donated by Ron Rinehard, the...
Today - Chicagohenge
Thursday, 22 September 2022 20:41
The date is Sep. 22, 2022, the date of the fall equinox. Although this is supposed to be the day of equal day and night, we know it's not exactly correct. We measure daytime from sunrise to sunset, measured as the first and last light from the sun peaking over the horizon. When we include sunrise and sunset plus atmospheric refration, at mid latitudes daylight wins by about 10...
Indiana French Dial Found
Saturday, 27 August 2022 19:06
Smithsonian Collection - Pocket sundial by Bourgaud of Nantes, 1660–1675. (MA.325565)
From the National Museum of American History is an article about "How did a French pocket sundial end up buried in a field in Indiana?" published 20 July 2022 by Kidwell & Schechner.
It started in 1860 when Dr. Elisha Cannon, while plowing a field in Indiana, came...
2022 - Frans Maes
Tuesday, 23 August 2022 14:17
The 2022 Sawyer Dialing Prize went to Frans Maes "for his creation of an introductory course on dialing, built on the idea of supervised self-study; for his successful multi-year running of that course in Europe; and for his inspiration of NASS’ development of a North American version.”
Fred presented Frans with an award certification, the traditional cash prize of $250 and a custom made...
Interview with Sasch Stephens
Tuesday, 09 August 2022 21:32
What makes a sundial? Practically anything. Sasch Stephens discusses how he became interested in dialing. Since then he has turned many objects into solar time devices. It takes some creative thinking to invision how a common object can become a working sundial. One of the most recent projects turned a 54 x 28 foot south side of a building it into a giant sundial...
World's Smallest Sundial Gets a Lot Smaller
Sunday, 12 June 2022 22:00
Dr. Jeremy Robinson, (Naval Research Laboratory, Electronics Science and Technology Division) combined efforts with his father-in-law, Prof. Woodruff Sullivan (Univ. of Washington Dept. of Astronomy) to construct the World's Smallest Sundial. The competition was sponsored by Cadrans Solaires pour Tous and their record is being entered into the Guiness Book of World...
Guiness Record for Smallest Sundial
Saturday, 28 May 2022 17:28
Perhaps the smallest sundial goes to IBM with the printing of a sundial in a corner of a computer chip. However it lacked a gnomon and could not really tell the time. However, Chen Fong-shean, a Taiwanese miniature craftsman, was challenged by the French astronomical society to beat the Guiness World Record for smallest sundial held by an Italian. The Italian dial created in...
British Sundial Society Founder Christopher Daniel Passes
Wednesday, 25 May 2022 14:42
NASS is saddened to report the passing of one of the UK’s pre-eminent sundial designer, Christopher St. J H Daniel who died on May 17, 2022. His works are to be found all over the UK, ranging from private commissions to major public works and to restorations and reconstruction of old and damaged sundials.
After a 13-year career at sea, Christopher Daniel joined the staff of the National...
Germany Observatory Gets Unusual Paint Over
Thursday, 05 May 2022 15:48
Hochshule KaiserLautern Observatory. HSKL Photo
When is an astronomical observatory not an observatory? When it's playing the roll of R2-D2.
According to Atlas Obscura, "A university in Germany [Hochschule KaisersLautern, University of Applied Scieces Kaiserslautern at the Zweibrücken campus] has transformed its hilltop observatory into the charming likeness...
NASS Member Hal Brandmaier Passes
Friday, 29 April 2022 16:12
NASS is saddened to report that longtime member Harold Brandmaier died on April 11, 2022. Throughout his long life, besides his ever-present sundials, Hal enjoyed stained glass, ship models, photography, travel, folk dance, and playing the hammered dulcimer and hand drums – always in company with his beloved wife Ginny. Hal had been a member since NASS founding and stepped in to help...
Tattoo Sundial
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Woodruff (Woody) T. Sullivan III hosted two NASS conferences, one in 1998 and a second in 2011, each time showing many new Seattle sundials...most of which he had a helping designer's hand. Woody made T-shirts proclaiming "Seattle - sundial capital of North America". Now in the on-line University of Washington Today for December 1, 2016, Peter Kelley profiled Professor Emeritus Sullivan, noting the many worlds of interest by the UW astronomer and astrobiologist...including his passion for sundials. In Kelley's interview Woody expounded "My sundial interest began very specifically in 1991. I got interested because three years before we moved in to the new Physics-Astronomy building in 1994, the architects asked , what do you want? I'm thinking of my interest in history of science and art and design, so I casualy said, 'A sundial would be nice'. Since then, it's hard to believe - like getting married - that there's a phase in my life before that."
That UW sundial was a large vertical decliner, entered in the NASS Sundial Registry as Dial #117. But now a new precision sundial...using an arm tattoo. Woody explained, "This started with a paleontologist graduate student in the astrobiology program. She likes sundials and we got talking and over the last couple of years we designed [a tattoo sundial]. The idea was for her to have it, but she how has her degree and has since left town. Meanwhile I said to myself, dammit - that would be pretty neat. In April I gave a talk to the British Sundial Society about the technical details and showed the decal I'd made for my inner forearm. I'm going to write it up for their publication. The world's first working sundial tattoo!"
Read more at:: http://www.washington.edu/news/2016/12/01/the-many-worlds-of-uw-astronomer-and-astrobiologist-woody-sullivan/
Nantucket Sun d'Isle
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More than 25 years ago Robert diCurcio made a compound sundial. A small round horizontal dial is surrounded by a larger gnomonic dial engraved with hour lines in the shape of analemmas. Careful inspection of the dial shows that the lines are offset from the longitude of 70 degrees to account for the sun at the eastern time meridian of 75 degrees west. In "Yesterday's Island - Today's Nantucket" Katherine Brooks of the Maria Mitchell Association (MMA) takes a close look at the sundial in their front yard, sitting on the lawn of the Maria Mitchell Observatory on Vestal Street.
Here is a slight correction to the article's text: diCurcio set up the sundial perfectly level and oriented it so that the meridian-line is exactly north-south. [Hopefully aligned to true north, NOT magnetic north.] Once the dial is aligned the triangular gnomon will cast a shadow not only for the small horizontal dial telling east coast solar time, but the tip of the gnomon shadow points to the analemma, the “figure of eights”, which shows standard or daylight mean time (clock time). Installed by diCurcio, the sundial at the Maria Mitchell Association is accurate to this day. Brooks writes,"We hope you stop by the Maria Mitchell Vestal Street Observatory on Vestal Street to see the 1908 observatory built by the MMA and to test out the Sun d’Isle on the lawn in front. If reading shadows interests you, we encourage you to attend our Summer Speaker Series this Tuesday, August 30,[2016] to learn about the “Effects of Light at Night” with Dr. Mario E. Motta."
Compare the photo of the MMA sundial from Brook's article http://yesterdaysisland.com/what-is-this-a-sundial/ with the sundial photo above that appears in the NASS Sundial Registry at http://www.sundials.org/index.php/component/sundials/oneDial/513
Central Park Shadows
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Michael Lee's photograph of Central Park started it all. Erika Owen (TravelandLeisure.com) wrote "If you think Central Park is only good for its slightly quieter reprieve from the hustle and bustle of the Big Apple, you're missing out. As it turns out, the park can actually be used as a giant sundial. Understandably, this isn't a universally accessible perk of the park...you'd need to be in an airplane or helicopter to truly appreciate the functionality."
Any vertical ediface such as a tall building, a flagpole, or even the Washington Monument can become a gnomonic sundial measuring time by the tip of their shadow. But seeing those shadows on the ground results in fuzzyness of the penumbral shadow. The solution? Step back, way back to a perspective of seeing the shadows from high in the air. From this view these giant sundials become visible. Owen continues, "Billionaire's Row, the name given to the skyscrapers lining the two blocks south of the park between Fifth Avenue and Central Park West gives off plenty of shadows..."
To see the shadows in motion, Cube Cities presents a short video "Central Park Shadows". Cube Cities specializes in urban city representations and animation software to create them. For example they visualize the growth of cities as Manhattan from the 1920s and the growth of San Franciso from 1977 to 2015 and Chicago from 1862 to 2014.
The Soldiers Clock
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An analemmatic sundial was dedicated July 4th 2016 at noon in the Frontier Heritage Park at La Pine, Oregon. The Daniel and Crystal Richer Family Foundation created a simple but accurate sundial where one's own shadow tells the time. The sundial honors veterans and the unmentioned heros of our country. The plaque sums it all: "Always Remember".
The video is from KTVZ, Channel 21: http://www.ktvz.com/news/new-la-pine-sundial-to-honor-veterans/40269620
New Courthouse Sundial
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News Item from the Wet Mountain Tribune on June 30th, 2016: Custer County courthouse is getting a new sundial. Using a true north line surveyed by county commissioner Kit Shy, Charlie French is cementing a rod anchored in obsidian rock, whose shadow will align with that of the courhouse flagpole. "Taking advantage of the summer solstice on June 20, he literally nailed down the farthest reach of the flagpole shadow."
While French happily proclaims, “thanks to Harrison [whose clock allowed longitude determination in 1761], and knowing where the time zone meridian is, and how distant we are from it, we are accurate to one minute and 51 seconds of Mountain Time here in the visible solar time at the courthouse.” Well, that's almost correct. French's gnomon rod and courthouse flagpole shadows align at local solar time. Mountain Time like other clock times do not match solar time due to the tilt of the earth's axis and eccentric orbit around the sun, shifting solar and clock time by +/- 15 minutes throughout the year. Read more at: http://www.wetmountaintribune.com/home.asp?i=945&p=6
Japan Sundial House
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As reported in Design Bloom architect Kikuma Watanabe has designed a beautiful modern house integrating asundial and solar design principles: "The internal spaces support a comfortable environment where in summer it is naturally cool and in the winter it is warm. This ecological technology aids this passive system using the sun and the wind for an effective air conditioner."
The interior of the house has two-story rooms and lots of natural wood. But unlike other houses except perhaps for the Cosmic Room in Corregadora, Mexico, it has a built in equatorial sundial. Central stairs lead up to the equatorial dial projection area with the gnomon itself a glass slit window in the roof. But the most important aspects for solar comfort are the angles of the eve overhangs, preventing hot summer sun from entering the windows yet allowing warming sunlight to enter during the winter . Brighter areas such as the kitchen are situated in rooms with southern exposure while the living room faces east looking out upon ponds and hills. Upstairs surrounding the equatorial dial projection ring are two rooms: the Room of Sunrise and the Room of Sunset, and on the main floor facing north is the Room of Shadow.
Texas Christian University Gets New Dial
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Example of an Andrewes Longitude Sundial |
Texas Christian University (TCU) in Fort Worth Texas will unveil a new longitude sundial on May 5th, 2015. As William Andrewes, creator of the longitude dial explains, "The Longitude Dial is based on an idea proposed in 1607 by Franz Ritter of Nuremburg...Ritter devised and published a world map projected from Nuremburg, with its lines of longitude arrayed to serve also as hour lines. However, the difficulties of creating a new project for each location and the expense of producing it in durable materials were considerable. Ritter's gnomonic projection map does not appear to have been developed for use in sundials - until now." See Andrewes website at: http://www.longitudedial.com/index.html
One of Andrewes sundials will be unveiled in front of Walsh Performing Arts Center, situated in the middle of a circular stone plaza. Andrewes monumental sundial prices start at $50,000. Read more at TCU-360 news
As an interesting side note, the gnomonic project map upon which Andrewes creates his sundials was extensively used during World War II and into the 1950's by high frequency (HF) direction finding (DF) sites. On the gnomonic map not only are lines of longitude straight, but any great circle line of bearing is straight as well. Using a pin on the DF site, the lines of bearing could be drawn with an extended piece of string. Computer calculations eventually replaced the manual direction finding and geolocation method.
World's Greatest Sundial?
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Of the 101 things that play in Peoria, the Pekin Illinois Sundial in Mineral Springs Park is rated #59, and billed as the World's greatest sundial in Pekin, Illinois. Even Google Maps marks the Pekin Sundial. The Pekin Park District says: "picturesquely located in the Sunken Gardens in Mineral Springs Park, this unique sundial tells the hours before or after noon and the highest point of the sun on a given day. More interesting information is available on the earth, sun, planets and latitude and longitude at the site."
The Peroria Journal Star interviewed Hentry Cakora, now 79, who built the dial using his family business, Tazewell Machine Parts and convinced the Pekin Park District to provide land for its construction in the Sunken Gardens of Mineral Springs Park. It's easy to spot on Google Maps just south of Court Street near the park's Lagoon that from spring through fall offers a pedalboat rides.
Cakora who knew about the sun's motion and was good at mathematics created a complex set of sundials. The main sundial is a horizontal dial about 6 feet tall of burnished steel, surrounded by hour marks on the ground. But if you're there near noontime there are extra treats. At the base of the sundial is a thin upright triangle split down the middle allowing it to cast a narrow beam of light toward the noon mark. Then there is a pole just north of the dial with two flat nodi about 12 inches in diameter, each having a hole in the center. The lower nodus casts a shadow that each hour falls on an analemma that allows correction for the sun's irregular "Equation of Time". Charts explain this to the observer as well. The upper nodus casts its shadow on a noon mark analemma, with small stakes to indicate the soltices and equinox.
Nearby is a planet. Is it part of a planet trail that starts from the Park's nearby fountain? Or is there another astronomical explanation? In any event, if the Pekin dial isn't one of the World's greatest, Cakora declares “I’m sure, by far, it’s the most accurate."
Read about it in the Peoria Journal Star: http://101.pjstar.com/59-worlds-greatest-sundial/ and see at: http://www.pekinparkdistrict.org/sundial.html
2015 - IYL Words and Light
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I would like to send you the direct link to more details on this competition, as I believe it may be of interest for some members of the NASS (I saw the Art and Literature section in the "Teachers Corner"). The deadline for submitting entries is coming soon - 31 March:
“Words and Light” is a tribute to all the writers who were inspired by Light, writers who were interested in the Science of Light, and scientists who were also poets. The Competition is dedicated to Mikhail Vasilyevich Lomonosov and Johann Wolfgang von Goethe, celebrating the publication of the grammar book by Lomonosov written in 1755 which reformed the Russian literary language by combining Old Church Slavonic with the vernacular (160th anniversary in 2015), and to the book "Theory of Colours" (Zur Farbenlehre) by Goethe, published in 1810, which contains detailed descriptions of phenomena such as coloured shadows, refraction, and chromatic aberration (205th anniversary in 2015).
Yours sincerely,
Ana Luisa
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Dr. Ana Luisa Simoes Gamboa
Associate Professor, Department of Industrial Ecology
ITMO University (Saint Petersburg National Research
University of Information Technologies, Mechanics and Optics)
Saint Petersburg, Russia
+7 911 716 37 22