what kind of written documents did he have?
His writings include the 1586 tract entitled "The Little Balance" and the 1606 printed manual "Le Operazioni del Compasso Geometrico et Militare"
Galileo Galilei
Galileo's early works describing scientific instruments include the 1586 tract entitled "The Little Balance" ("La Billancetta") describing an accurate balance to weigh objects in air or water and the 1606 printed manual "Le Operazioni del Compasso Geometrico et Militare" on the operation of a geometrical and military compass
where is europa located in the solar system It is orbiting Jupiter, and the sixth-closest to the planet of all the 79 known moons of Jupiter when was it discovered? 1610 by whom? Galileo Galilei state any one of its features? It is the smoothest known object in the Solar System, lacking large-scale features such as mountains and craters what is it composed of? Salts such as magnesium sulfate, sulfuric acid hydrate or abiotic organic compounds collectively called tholins who was this above person you mentioned? Astronomer, physicist and engineer can you mention some other notable works of him? Invention of the thermoscope and various military compasses, telescopic confirmation of the phases of Venus, the observation of the four largest satellites of Jupiter, the observation of Saturn's rings, and the analysis of sunspots the first invention that you mentioned just now; what is that? A device that shows changes in temperature when was it invented? 1593 what theories did the above person have on tides? The tides were caused by the sloshing back and forth of water in the seas as a point on the Earth's surface sped up and slowed down because of the Earth's rotation on its axis and revolution around the Sun was he involved in any controversial theory? Yes. Over the nature of comets and his defense of heliocentrism based on his astronomical observations of 1609
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Galileo Galilei [SEP] Writings
Galileo's early works describing scientific instruments include the 1586 tract entitled "The Little Balance" ("La Billancetta") describing an accurate balance to weigh objects in air or water and the 1606 printed manual "Le Operazioni del Compasso Geometrico et Militare" on the operation of a geometrical and military compass. His early works on dynamics, the science of motion and mechanics were his "circa" 1590 Pisan "De Motu" (On Motion) and his "circa" 1600 Paduan "Le Meccaniche" (Mechanics). The former was based on Aristotelian–Archimedean fluid dynamics and held that the speed of gravitational fall in a fluid medium was proportional to the excess of a body's specific weight over that of the medium, whereby in a vacuum, bodies would fall with speeds in proportion to their specific weights.