Galileo is one of my heroes but he did not invent the telescope. It may have been one Hans Lippershey, a German-Dutch spectacle maker, based on the fact the he was the first to apply for a patent for one, but no one is entirely sure; the most likely scenario is that, much like with the airplane, it was a number of people building on each other's work. Galileo made some improvements on it but his real claim to telescopic fame was that he was one of the first to turn the device to the sky, write down what he saw and then publish it. For this, he's often called the first real scientist.
If he was a REAL scientist, does that mean he knew Morse code?
A clear conscience is usually a sign of a bad memory