““However, Galileo got into trouble when he turned his telescope toward a wider horizon. The discovery of the four moons orbiting Jupiter — Io, Europa, Ganymede, and Callisto — suggested that the Earth was not the centre of the universe about which all celestial bodies orbited. By challenging the geocentric model of the Solar System, Galileo found himself accused of heresy and was placed under house arrest for the rest of his life.””
