He probably was not the first person to aim the new invention at the night sky[9] but his was the first systematic (and published) study of celestial bodies using one.[10] One of Galileo's first telescopes had 8x to 10x linear magnification and was made out of lenses that he had ground himself.[11] This was increased to 20x linear magnification in the improved telescope he used to make the observations in Sidereus Nuncius.[12][6]