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) Galileo Galilei (opera) Galileo Galilei is an opera based on excerpts from the life of Galileo Galilei which premiered in 2002 at Chicago's Goodman Theatre, as well as subsequent presentations at the Brooklyn Academy of Music's New Wave Music Festival and London's Barbican Theatre. Music by Philip Glass, libretto and original direction by Mary Zimmerman and Arnold Weinstein. The piece is presented in one act consisting of ten scenes without break. "Galileo Galilei" is Glass' 18th opera, and draws from letters of Galileo and his family, and various other documents, to retrospectively journey through Galileo's life. Opening with him as