What's New Under The Sun

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...

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...

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...

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,...

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. ...

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...

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....

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. ...

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)...

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...

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...

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...

Compendium_Dec2008_FrontPageThis issue begins with "Sundials for Starters" by Robert Kellogg from Maryland, describing the Cahokia Mounds American Woodhenge built by Mississippian Indians.  Robert then discusses the mathematics of astro-archeology to compute the alignments of the wooden posts for sunrise at summer and winter solstices and at the spring-fall equinox.  During the mathematical investigation Robert exclaims, " Our euphoria at becoming the next Indiana Jones is shattered however when we realize that (1) we have ignored refraction, (2) we've used the center of the sun and may need to use the uppoer or bottom limb of the sun as a realistic, observable marker, and (3) we have ignored the Collinsville Bluffs that rise above the true horizon."  So how do we solve the problem? Read The Compendium and find out.

The Alessandro Gunella from Italy discusses the "Discovery that Lines for Unequal Hours are Not Straight", or at least this was the thinking during the 16th century.  Are they curved or straight? 

Next the Connecticut Historical Society discusses the Sheldon Moore Sundial, a popular dial manufactured in Kennsignton, CT during the 1840's. "The manufacture of sundials was commenced prior to August 1840, in which month, a supply was sent to Breck & Company of Boston for sale at 20% commission.  In six months they sold 18 dials, which apparently encouraged Sheldon Moore to expanc his facilities".  How much did they cost?  Read The Compendium and find out.

John Davis of the UK discusses a Triple Horizontal Dial for California. John starts his article with an introduction "There are not many clients for a horizontal sundial that have consulted an original copy of William Leybourn's 1682 book on dialing before arriving to discuss their dial design.  But Dr. Rudy Light of Redwood Valley, California, had done so and also brought a copy of Leybourn's diagram of 'An Horizontall Dial with its Furniture' ... with him when he visited me in the summer of 2003.  When he explained that he wanted a large scientific dial to position ouside his house and that he 'wasn't aftriad of complications', I knew it would be an interesting project."  The result of the project is on the cover of this issue of The Compendium.

And did you know that The Entrance Exam for Japaneese Junior High School students contains questions about gnomonics?  Could you answer the questions correctly?  See if you qualify for Shibuya Kyoiku Gakuen Makuhari Junior High School, Chiba City, Japan.  Barry Duel, an NASS member interviewed the author of the gnomnics questions to find "The science teacher who made the test explained in an interview that he tries to prepare problems that students cannon easily memorize in advance.  He wants students who can think ..."

Read this issue of The Compendium to find these articles and much, much more. DOWNLOAD FREE

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