Re: Strange sundial in China

Perhaps a geometrically convoluted gnomon. in 1/5/2021 6:23 AM, pol...@sterrenwacht.eu wrote: Hi group, I saw this sundial in the Xi'an Mosque in China. Can anyone tell me how this sundial worked? Clear skies,  Gerard van den Braak www.sterrenwacht.eu

Re: New indoor sundial with lens/mirror

Spectacular! Techno-Modern-Gnomonics.  Almost a reverse display, instead of shadow, the point of light is the display.   Sort of a reflecting gnomon -rather than a shadow.   In my translated page it is called a shadow - but should there be a different term for a concentrated spot of light?

Re: Sundial books for children

Children's tale of  Mr. Stemwinder Finds the Time Childrens' book written by Stephen Y. Bready, illustrated by Antoinette Delaney.- around 1979 Mr Stemwinder collected clocks... loved to hear them chime on the hour and noon and midnight But one autumn day he got lost walking in the

video Time Lapse Sky Shows Earth Rotating Instead of Stars fixed audio

Same action, different view. Sort of like having a fixed gnomon shadow and a rotating dial face Astounding video... great, instructional experience. https://youtu.be/IYdl5509IhA Time Lapse Sky Shows Earth Rotating Instead of Stars fixed audio https://youtu.be/IYdl5509IhA

Re: largest sundial

I heard Bill Nye The Science Guy talk about his father wanting to set out marks for the Washington Monument. Great idea, but the problem was the fuzzy shadow. On 10/27/2015 3:33 AM, Jackie Jones wrote: Can someone please tell me what is the world’s largest sundial? If a vertical tower,