Galileo's Sidereus Nuncius, Or a Sidereal Message

An instrument can change the world and compel us to rethink our place in the universe.The telescope did just this, but only when it was used by Galileo, whose eye was prepared to see new things and whose hand was able to depict what he saw. It was not only because Galileo was a gifted and persistent observer, but also because he was an exceptional draughtsman that he was able to discover what others had failed to see or lacked the ability to record.