Tourbillon is an addition to the mechanics of a watch escapement. Developed around 1795 by the French-Swiss watchmaker Abraham-Louis Breguet from an earlier idea by the English chronometer maker John Arnold, a tourbillon aims to counter the effects of gravity by mounting the escapement and balance wheel in a rotating cage, to negate the effect of gravity when the timepiece (thus the escapement) is stuck in a certain position.
Astrolabes are problem solving instruments – they compute things such as the time of day according the position of the sun and the stars in the sky. Like a computer, you input information and then you receive output. They were typically made of brass and had a 6 inch diameter, although as we will see much larger ones were made.
Símbolos mayas - Los mayas usaron un lenguaje escrito que combinaba glifos idea , fonética y números para registrar sus observancias astronómicas , prácticas médicas , la historia y las creencias religiosas. No fue hasta muchos años después de la Segunda Guerra Mundial que fue finalmente descifrados .
This elegant compendium—an astronomical toolkit from 1557—contains two different kinds of sundial, a nocturnal and two lunar volvelles to tell time at night, a world map, ten pages engraved with astronomical and astrological tables, seven blank pages, and a magnetic compass. (Adler Collections M-363)