Sundials and the Science of Time
2025:
- This workshop is not currently scheduled. It is also offered as a private tutorial, starting at $500 per person, online or at your location (travel expenses at standard rates).
The science of time was the key to exploring and mapping the world. In this workshop, participants build their own sundials while learning all about time in its various forms from sidereal time and Greenwich Mean Time to local apparent time and Daylight Saving Time. And we'll discuss the nature of time as understood in modern physics, touching on relativistic time dilation and its effect on your own smartphone.
We'll learn how to adjust backyard sundials, and how to read the time of day just by observing the Sun in the sky. We'll cover the Julian and Gregorian calendars, leap years and leap seconds, sextant time sights and the mysterious "equation of time", all viewed through the lens of thousands of years of fascinating history.
Taught by Frank Reed, a gifted teacher and a recent guest expert in celestial navigation on Neil deGrasse Tyson's StarTalk science talk show on The National Geographic Channel.
- Saturday & Sunday, 10am-4pm.
- Requirements: Basic addition and subtraction.
- Recommended for ages 10 and up.
Comments:
Several things stand out. The course material is presented in a balanced way, with a well thought mixture of detailed calculation, broken up by historical, factual, and hands-on aspects. This type of teaching is well suited to most, as it provides periods of more intense reasoning with relaxation and humor. Anyone can walk away with new-found knowledge. I also feel that the approach of understanding historical context and a simple practical approach is unique. It has gone a great way toward clearing up a lot of my preconceived ideas and confusions resulting from the many contradictory or esoteric approaches found in various volumes or on the internet.
Very simply, I learned a lot and it went a long way toward clearing up a mess. I was fascinated the whole time. The courses and NavList provide the tools to keep learning even after the course is over. I left able to measure what I see with a more calibrated eye for real world application, and a greater appreciation of human history. I can strongly recommend these classes for the curious, the fascinated, the historian, the hardcore navigator, or the armchair one. There is something in them for all.
I also found the NavList community to be helpful and encouraging as my journey continues. I hope I can undertake even more material in additional courses in the future.
"There is nothing - absolutely nothing - half so much worth doing as simply messing about in boats" (Kenneth Grahame, from the "Wind in the Willows")
Capt. Mark
I must admit I dreaded two, back-to-back, 5-hour days, but the time sailed by. (Sorry can't resist.) Thank you.
He also included some 17th century data that I needed. I'm neither a mathematician nor a sailer, but a journalist and author.