Galilean <i>Giovilabio</i>
notes: label: Description
content: Galileo Galilei (1564–1642) hoped to use the movements of four large moons of the planet Jupiter to determine longitude at sea, and applied, without success, to the Spanish crown for the prize offered for this achievement.
label: Description
content: This instrument, known as the Giovilabio, is based on Galileo's ideas. The larger revolving disc represents Jupiter and the smaller one the Sun. The discs are connected and their movements show when the four moons, observed from the Earth, enter and leave the shadow of Jupiter. The instrument’s plate is engraved in Latin with tables to predict these eclipses and it can also indicate time (though less precisely) from the observed positions of the moons.
label: Description
content: The donor of this Giovilabio believed that it had been made under the direct supervision of Gaileo, by one of his pupils. We now think it was at the Museo di Antichi Stumenti in Florence, circa 1900.
label: Description
content: References:
label: Description
content: 1. Bedini, Silvio A. “The Galilean Jovilabe,“ <i>Nuncius, 1</i>, 1986, pp. 25-46.
label: Description
content: 2. Bedini , Silvio A. <i>The Pulse of Time: Galileo, the Determination of Longitude, and the Pendulum Clock</i>, Florence: Leo S. Olschki, 1991, pp. 7-21.
label: Description
content: 3. G. Vanpaemel, "Science Disdained: Galileo and the Problem of Longitude," <i>Italian Scientists in the Low Countries in the XVIIth and XVIIIth Centuries</i>, Edited by C. S. Maffeoli and L. C. Palm, Amsterdam: Rodopi, 1989, pp. 111-129.
label: Description
content: 4. The Jovilabe: History and Design. http://hotgates.stanford.edu/Eyes/Jovilabe.old/jovhistory.html, accessed March 31, 2013.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Time and Navigation
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content: Measuring & Mapping
creditLine: label: Credit Line
content: Carolyn Mugar
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.336360
label: catalog number
content: 336360
label: accession number
content: 1977.0878
objectType: label: Object Name
content: Galilaean Giovilabio (replica)
physicalDescription: label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: 8 cm x 20 cm x 41 cm; 3 5/32 in x 7 7/8 in x 16 5/32 in