In June or July of 1609, word reached Galileo the telescope, which had been invented in Holland. Without knowing the technical details of the construction of the device, he managed to create one for himself. With it, he was able to witness a supernova, observe our moon, and document the phases of Venus. He also located sunspots. These discoveries helped support the Copernican system. | In June or July of 1609, word reached Galileo the telescope, which had been invented in Holland. Without knowing the technical details of the construction of the device, he managed to create one for himself. With it, he was able to witness a supernova, observe our moon, and document the phases of Venus. He also located sunspots. These discoveries helped support the Copernican system. |