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 (opera) and explains his theory to Marie. "Presentation of the Telescope" Galileo presents his invention to the Duchess and her Ladies in Waiting. The Duchess and Galileo reminisce about a time in their youth when they watched an opera together composed by Galileo's father, Vincenzo. "Opera within the Opera" The Duchess and Galileo, now children, are in the audience as his father's opera is performed. The magical story of the planetary figures becomes the vehicle through which Galileo is reunited with his deceased daughter. Galileo Galilei (opera) Galileo Galilei is an opera based on excerpts from the life of Galileo Galilei