Galileo’s observations about the solar system made him the father of modern astronomy. They also clashed with the teachings of the Roman Catholic Church. And in 17th century Italy, spreading scientific facts could earn a death sentence. Opera Theatre of St. Louis is presenting a work about Galileo by the American composer Phillip Glass that opens Saturday. In a report by STLPR's Jeremy Goodwin, Performers Paul Groves and Vanessa Becerra reflect on some key moments in the opera and its continuing relevance.