Skip to comments.Astronomy Picture of the Day -- A Sundial that Shows Solstice
Posted on 06/26/2012 4:29:15 AM PDT by SunkenCiv
Explanation: What time is it? If the time and day are right, this sundial will tell you: SOLSTICE. Only then will the Sun be located just right for sunlight to stream through openings and spell out the term for the longest and shortest days of the year. And that happened last week and twice each year. The sundial was constructed by Jean Salins in 1980 and is situated at the Ecole SupÃ©rieure des Mines de Paris in Valbonne Sophia Antipolis of south-eastern France. On two other days of the year, watchers of this sundial might get to see it produce another word: EQUINOXE.
(Excerpt) Read more at 18.104.22.168 ...
[Credit & Copyright: Jean-Marc Mari]
Resource Guide: NASA Education and Public Outreach
A modern stonehenge
That took some brain power.
Um. unh. uhh.
Anasazi (the ancient ones) Calendar
Elsewhere there are photo’s of this device that show how old civilizations predicted the seasons accurately with crude looking instruments.
And twice a day it spells out “STOP AT WALL DRUG”. NASA is still trying to figure this out.
(This is a 2d ascii graphics game in which you can build simple mechanical components like screw pumps, gates, and switches, and then arrange them into more complex machines. Building a precision clock that way is doable, but extremely difficult, hence it's a "megaproject".)