Who Invented The First Thermometer? History Of First Thermometer - Biography of Galileo Galilei

Who Invented The First Thermometer? History Of First Thermometer - Biography of Galileo Galilei. Galileo Galilei (born in Pisa, Tuscany, 15 February 1564 - died in Arcetri, Tuscany, January 8, 1642 at the age of 77) is an Italian astronomer, philosopher and physicist who has a major role in scientific revolution. 

His contributions in scholarship include the refinement of telescopes, astronomical observations, and the laws of motion first and second (dynamics). In addition, Galileo is also known as a proponent of Copernicus concerning the circulation of the earth around the sun. 


Galileo Galilei was born in Pisa, Tuscany on 15 February 1564 as the first child of Vincenzo Galilei, a mathematician and musician from Florence, and Giulia Ammannati. He has been educated since childhood. Later, he studied at the University of Pisa but was stalled due to financial problems. Fortunately, he was offered a post there in 1589 to teach mathematics. After that, he moved to the University of Padua to teach geometry, mechanics, and astronomy until 1610. At that time, he had studied science and made inventions. 

 Galileo Galilei

In 1612, Galileo went to Rome and joined the Accademia dei Lincei to observe sunspots. That same year, there was a rejection of Nicolaus Copernicus's theory, a theory supported by Galileo. In 1614, from Santa Maria Novella, Tommaso Caccini denounced Galileo's view of the movement of the earth, suggesting that the theory was heretical and dangerous. Galileo himself went to Rome to defend himself. In 1616, Cardinal Roberto Bellarmino submitted a notice prohibiting him from supporting or teaching Copernican theory. 

Galileo wrote Saggiatore in 1622, which was later published in 1623. In 1624, he developed one of the earliest microscopes. In 1630 he returned to Rome to authorize the printing of Dialogo sopra i due massimi sistemi del mondo which was published in Florence in 1632. However, that same year, the Catholic Church overthrew the verdict that Galileo should be detained in Siena.

In December 1633, he was allowed to retire to his villa in Arcetri. His final book, Discorsi e dimostrazioni matematiche, intorno à due nuove scienze was published in Leiden in 1638. At that time, Galileo was almost totally blind. On January 8, 1642, Galileo died in Arcetri while accompanied by Vincenzo Viviani, one of his disciples. 

The invention of the Thermos

Before the thermometer was discovered, astronomers and naturalists made every effort to create instruments that could measure temperature. They know that temperatures can make substances expand. To that end, they use the size of the substance expansion as a benchmark in measuring temperature. But the invention of temperature gauges can not be easily created. Experts need to find the right substance, the right technique and the right scale to be able to measure carefully.

Termometer Galileo Galilei 

In 1593, Galileo Galilei attempted to make thermometer measurements by means of air expansion. Tool created by Galileo is then called the theater. Although still relatively simple, but roughly this tool can measure the temperature. 
Termometer Galileo Galilei
Galileo's thermosphere

The galileo thermosphere consists of a glass of chicken the size of a chicken egg connected to a long, sealed pipe filled with water. Inside the liquid hung a load amount. Generally the load is attached to a sealed glass ball containing a colored liquid for aesthetic effect. As the temperature changes, the fluid density inside the cylinder changes, causing the glass bulb to move or sink to reach a position where the density is equal to the surrounding liquid or stopped by another glass sphere. When the difference in glass ball density is very small and sequenced in such a way that the less tightly is above and which is below, it can form a temperature scale.

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