Galileo Galilei, Letter to Belisario Vinta

Sidereus Nuncius

Autograph diary of observations of Jupiter

Letter to Belisario Vinta

Drawings of the sunspots

Istoria e dimostrazioni intorno alle macchie solari

Exploded replica of Galileo’s telescope

Octagonal telescope with seven tubes

Biconcave eyepiece lens

Telescope with four tubes

Metal shapes for telescopes and microscopes

Measuring bundle

Binocular telescope

Galileo Galilei, Letter to Belisario Vinta

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Galileo Galilei (1564-1642)
Letter to Belisario Vinta, Padua, July 1610
Florence, Biblioteca Nazionale Centrale, Ms. Gal. 86, f. 42r

Galileo informs the Secretary of State of the Grand Duchy of Tuscany that, thanks to his telescope, he has discovered that Saturn comprises three bodies. He provides a rough outline sketch of the planet's three-bodied aspect.