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This page was last edited on 29 September 2023, at 19:35 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Shadows is a software package for the calculation and drawing of sundials and astrolabes, available as a freeware in its base level.. It has been developed by François Blateyron, software developer and amateur astronomer, who made it available on Internet since 1997 and continues to improve it. [1]
The Sunquest Sundial is a sundial designed by Richard L. Schmoyer in the 1950s. Adjustable for latitude and longitude, the Sunquest's gnomon automatically corrects for the equation of time allowing it to tell clock time. The Sunquest sundial utilizes a cast aluminum gnomon, the shape of which is related to the analemma. When turned to face the ...
The Noon mark is a type of sundial that at its simplest is a vertical line on a south facing wall or a north-south line on a horizontal pavement. When the shadow of a point (or a projected image of the Sun) crosses the line it will be midday.
The MarsDial can function as a gnomon, the stick or other vertical part of a sundial. [2] [3] The length and direction of the shadow cast by the stick allows observers to calculate the time of day. [2] The sundial can also be used to tell which way is North, and to overcome the limitations of a magnetic north different from a true north. [2]
A tide dial, also known as a mass dial [2] or a scratch dial, [3] [4] is a sundial marked with the canonical hours rather than or in addition to the standard hours of daylight. Such sundials were particularly common between the 7th and 14th centuries in Europe, at which point they began to be replaced by mechanical clocks. There are more than ...