Galileo Galilei to the biography by Vincenzo Viviani) that these began by watching the swings of the bronze chandelier in the cathedral of Pisa, using his pulse as a timer. Later experiments are described in his "Two New Sciences". Galileo claimed that a simple pendulum is isochronous, i.e. that its swings always take the same amount of time, independently of the amplitude. In fact, this is only approximately true, as was discovered by Christiaan Huygens. Galileo also found that the square of the period varies directly with the length of the pendulum. Galileo's son, Vincenzo, sketched a clock based on his father's
Galileo Galilei planetarium Galileo Galilei planetarium The Galileo Galilei planetarium, commonly known as Planetario, is located in Parque Tres de Febrero in the Palermo district of Buenos Aires, Argentina. The idea that Buenos Aires should have a planetarium began to take shape in 1958 by an agreement between Socialist Councilman José Luis Peña and the municipal Secretary of Culture, Dr. Aldo Cocca. Construction began under the direction of architect Enrique Jan in 1962, and it was inaugurated on December 20, 1966. The first function was carried out on June 13, 1967 for the students of "Escuela Comercial Nº 1" of Banfield and "Santa